86137681 has 4 divisors (see below), whose sum is σ = 98443072. Its totient is φ = 73832292.

The previous prime is 86137669. The next prime is 86137687. The reversal of 86137681 is 18673168.

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 86137681 - 2⁹ = 86137169 is a prime.

It is a super-2 number, since 2×86137681² = 14839400176115522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (86137687) 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, 6152685 + ... + 6152698.

It is an arithmetic number, because the mean of its divisors is an integer number (24610768).

Almost surely, 2^86137681 is an apocalyptic number.

It is an amenable number.

86137681 is a deficient number, since it is larger than the sum of its proper divisors (12305391).

86137681 is a wasteful number, since it uses less digits than its factorization.

86137681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12305390.

The product of its digits is 48384, while the sum is 40.

The square root of 86137681 is about 9281.0387888426. The cubic root of 86137681 is about 441.6359228313.

The spelling of 86137681 in words is "eighty-six million, one hundred thirty-seven thousand, six hundred eighty-one".