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71913 = 323971
BaseRepresentation
bin10001100011101001
310122122110
4101203221
54300123
61312533
7416442
oct214351
9118573
1071913
114a036
1235749
132696a
141c2c9
1516493
hex118e9

71913 has 4 divisors (see below), whose sum is σ = 95888. Its totient is φ = 47940.

The previous prime is 71909. The next prime is 71917. The reversal of 71913 is 31917.

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: 31917 = 310639.

It is an interprime number because it is at equal distance from previous prime (71909) and next prime (71917).

It is not a de Polignac number, because 71913 - 22 = 71909 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 71913.

It is not an unprimeable number, because it can be changed into a prime (71917) 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, 11983 + ... + 11988.

It is an arithmetic number, because the mean of its divisors is an integer number (23972).

271913 is an apocalyptic number.

It is an amenable number.

71913 is a deficient number, since it is larger than the sum of its proper divisors (23975).

71913 is a wasteful number, since it uses less digits than its factorization.

71913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23974.

The product of its digits is 189, while the sum is 21.

The square root of 71913 is about 268.1659933698. The cubic root of 71913 is about 41.5849134767.

The spelling of 71913 in words is "seventy-one thousand, nine hundred thirteen".

Divisors: 1 3 23971 71913