7855397 has 16 divisors (see below), whose sum is σ = 9106560. Its totient is φ = 6705600.

The previous prime is 7855381. The next prime is 7855399. The reversal of 7855397 is 7935587.

It is a happy number.

It is not a de Polignac number, because 7855397 - 2⁴ = 7855381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7855399) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15179 + ... + 15687.

It is an arithmetic number, because the mean of its divisors is an integer number (569160).

Almost surely, 2^7855397 is an apocalyptic number.

It is an amenable number.

7855397 is a deficient number, since it is larger than the sum of its proper divisors (1251163).

7855397 is a wasteful number, since it uses less digits than its factorization.

7855397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604.

The product of its digits is 264600, while the sum is 44.

The square root of 7855397 is about 2802.7481156893. The cubic root of 7855397 is about 198.7876407751.

The spelling of 7855397 in words is "seven million, eight hundred fifty-five thousand, three hundred ninety-seven".