86618907 has 24 divisors (see below), whose sum is σ = 128685024. Its totient is φ = 56120064.

The previous prime is 86618881. The next prime is 86618933. The reversal of 86618907 is 70981668.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (86618881) and next prime (86618933).

It is not a de Polignac number, because 86618907 - 2⁶ = 86618843 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86618947) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 53098 + ... + 54704.

It is an arithmetic number, because the mean of its divisors is an integer number (5361876).

Almost surely, 2^86618907 is an apocalyptic number.

86618907 is a deficient number, since it is larger than the sum of its proper divisors (42066117).

86618907 is a wasteful number, since it uses less digits than its factorization.

86618907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1779 (or 1776 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 86618907 is about 9306.9279034491. The cubic root of 86618907 is about 442.4568262005.

The spelling of 86618907 in words is "eighty-six million, six hundred eighteen thousand, nine hundred seven".