7139957 has 4 divisors (see below), whose sum is σ = 7789056. Its totient is φ = 6490860.

The previous prime is 7139947. The next prime is 7139971. The reversal of 7139957 is 7599317.

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.

It is a cyclic number.

It is not a de Polignac number, because 7139957 - 2⁸ = 7139701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7139917) 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, 324533 + ... + 324554.

It is an arithmetic number, because the mean of its divisors is an integer number (1947264).

Almost surely, 2^7139957 is an apocalyptic number.

It is an amenable number.

7139957 is a deficient number, since it is larger than the sum of its proper divisors (649099).

7139957 is a wasteful number, since it uses less digits than its factorization.

7139957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649098.

The product of its digits is 59535, while the sum is 41.

The square root of 7139957 is about 2672.0697969926. The cubic root of 7139957 is about 192.5596104813.

The spelling of 7139957 in words is "seven million, one hundred thirty-nine thousand, nine hundred fifty-seven".