87397764321 has 32 divisors (see below), whose sum is σ = 136422696960. Its totient is φ = 48727171584.

The previous prime is 87397764283. The next prime is 87397764367. The reversal of 87397764321 is 12346779378.

It is a happy number.

It is not a de Polignac number, because 87397764321 - 2⁶ = 87397764257 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (87396764321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 786796 + ... + 890978.

It is an arithmetic number, because the mean of its divisors is an integer number (4263209280).

Almost surely, 2^87397764321 is an apocalyptic number.

It is an amenable number.

87397764321 is a deficient number, since it is larger than the sum of its proper divisors (49024932639).

87397764321 is a wasteful number, since it uses less digits than its factorization.

87397764321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105165.

The product of its digits is 10668672, while the sum is 57.

The spelling of 87397764321 in words is "eighty-seven billion, three hundred ninety-seven million, seven hundred sixty-four thousand, three hundred twenty-one".