86939145 has 24 divisors (see below), whose sum is σ = 152822592. Its totient is φ = 45712800.

The previous prime is 86939141. The next prime is 86939161. The reversal of 86939145 is 54193968.

It is a happy number.

It is not a de Polignac number, because 86939145 - 2² = 86939141 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 86939145.

It is not an unprimeable number, because it can be changed into a prime (86939141) 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, 10411 + ... + 16800.

It is an arithmetic number, because the mean of its divisors is an integer number (6367608).

Almost surely, 2^86939145 is an apocalyptic number.

It is an amenable number.

86939145 is a deficient number, since it is larger than the sum of its proper divisors (65883447).

86939145 is a wasteful number, since it uses less digits than its factorization.

86939145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27293 (or 27290 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 86939145 is about 9324.1163120158. The cubic root of 86939145 is about 443.0014233572.

The spelling of 86939145 in words is "eighty-six million, nine hundred thirty-nine thousand, one hundred forty-five".