87157902397 has 4 divisors (see below), whose sum is σ = 88635155040. Its totient is φ = 85680649756.

The previous prime is 87157902353. The next prime is 87157902401. The reversal of 87157902397 is 79320975178.

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 87157902397 - 2⁷ = 87157902269 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87157900397) 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, 738626233 + ... + 738626350.

It is an arithmetic number, because the mean of its divisors is an integer number (22158788760).

Almost surely, 2^87157902397 is an apocalyptic number.

It is an amenable number.

87157902397 is a deficient number, since it is larger than the sum of its proper divisors (1477252643).

87157902397 is a wasteful number, since it uses less digits than its factorization.

87157902397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1477252642.

The product of its (nonzero) digits is 6667920, while the sum is 58.

The spelling of 87157902397 in words is "eighty-seven billion, one hundred fifty-seven million, nine hundred two thousand, three hundred ninety-seven".