397291167525 has 36 divisors (see below), whose sum is σ = 750718410272. Its totient is φ = 181612217280.

The previous prime is 397291167523. The next prime is 397291167547. The reversal of 397291167525 is 525761192793.

It is a happy number.

It is not a de Polignac number, because 397291167525 - 2¹ = 397291167523 is a prime.

It is a super-2 number, since 2×397291167525² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397291167523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 14428471 + ... + 14455979.

Almost surely, 2^397291167525 is an apocalyptic number.

397291167525 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

397291167525 is a deficient number, since it is larger than the sum of its proper divisors (353427242747).

397291167525 is an frugal number, since it uses more digits than its factorization.

397291167525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55038 (or 27524 counting only the distinct ones).

The product of its digits is 7144200, while the sum is 57.

The spelling of 397291167525 in words is "three hundred ninety-seven billion, two hundred ninety-one million, one hundred sixty-seven thousand, five hundred twenty-five".