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7141997 = 31230387
BaseRepresentation
bin11011001111101001101101
3111102211222102
4123033221231
53312020442
6413024445
7114464102
oct33175155
914384872
107141997
114038985
122485125
131630a45
14d3caa9
15961232
hex6cfa6d

7141997 has 4 divisors (see below), whose sum is σ = 7372416. Its totient is φ = 6911580.

The previous prime is 7141991. The next prime is 7142011. The reversal of 7141997 is 7991417.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7991417 = 71141631.

It is a cyclic number.

It is not a de Polignac number, because 7141997 - 26 = 7141933 is a prime.

It is a super-2 number, since 2×71419972 = 102016242296018, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7141997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7141991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115163 + ... + 115224.

It is an arithmetic number, because the mean of its divisors is an integer number (1843104).

Almost surely, 27141997 is an apocalyptic number.

It is an amenable number.

7141997 is a deficient number, since it is larger than the sum of its proper divisors (230419).

7141997 is a wasteful number, since it uses less digits than its factorization.

7141997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230418.

The product of its digits is 15876, while the sum is 38.

The square root of 7141997 is about 2672.4514962858. The cubic root of 7141997 is about 192.5779478560.

The spelling of 7141997 in words is "seven million, one hundred forty-one thousand, nine hundred ninety-seven".

Divisors: 1 31 230387 7141997