86542634 has 4 divisors (see below), whose sum is σ = 129813954. Its totient is φ = 43271316.

The previous prime is 86542633. The next prime is 86542679. The reversal of 86542634 is 43624568.

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

It can be written as a sum of positive squares in only one way, i.e., 51768025 + 34774609 = 7195^2 + 5897^2 .

It is not an unprimeable number, because it can be changed into a prime (86542633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21635657 + ... + 21635660.

Almost surely, 2^86542634 is an apocalyptic number.

86542634 is a deficient number, since it is larger than the sum of its proper divisors (43271320).

86542634 is a wasteful number, since it uses less digits than its factorization.

86542634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43271319.

The product of its digits is 138240, while the sum is 38.

The square root of 86542634 is about 9302.8293545566. The cubic root of 86542634 is about 442.3269183814.

The spelling of 86542634 in words is "eighty-six million, five hundred forty-two thousand, six hundred thirty-four".