86711978 has 8 divisors (see below), whose sum is σ = 135723168. Its totient is φ = 41470924.

The previous prime is 86711969. The next prime is 86711983. The reversal of 86711978 is 87911768.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 942476 + ... + 942567.

It is an arithmetic number, because the mean of its divisors is an integer number (16965396).

Almost surely, 2^86711978 is an apocalyptic number.

86711978 is a deficient number, since it is larger than the sum of its proper divisors (49011190).

86711978 is a wasteful number, since it uses less digits than its factorization.

86711978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1885068.

The product of its digits is 169344, while the sum is 47.

The square root of 86711978 is about 9311.9266534912. The cubic root of 86711978 is about 442.6152410331.

The spelling of 86711978 in words is "eighty-six million, seven hundred eleven thousand, nine hundred seventy-eight".