86961739657 has 4 divisors (see below), whose sum is σ = 93651104260. Its totient is φ = 80272375056.

The previous prime is 86961739603. The next prime is 86961739687. The reversal of 86961739657 is 75693716968.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 34460724496 + 52501015161 = 185636^2 + 229131^2 .

It is a cyclic number.

It is not a de Polignac number, because 86961739657 - 2²⁷ = 86827521929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 86961739592 and 86961739601.

It is not an unprimeable number, because it can be changed into a prime (86961739687) 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, 3344682282 + ... + 3344682307.

It is an arithmetic number, because the mean of its divisors is an integer number (23412776065).

Almost surely, 2^86961739657 is an apocalyptic number.

It is an amenable number.

86961739657 is a deficient number, since it is larger than the sum of its proper divisors (6689364603).

86961739657 is a wasteful number, since it uses less digits than its factorization.

86961739657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6689364602.

The product of its digits is 102876480, while the sum is 67.

The spelling of 86961739657 in words is "eighty-six billion, nine hundred sixty-one million, seven hundred thirty-nine thousand, six hundred fifty-seven".