86978351 has 4 divisors (see below), whose sum is σ = 87001704. Its totient is φ = 86955000.

The previous prime is 86978347. The next prime is 86978357. The reversal of 86978351 is 15387968.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 86978351 - 2² = 86978347 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 86978296 and 86978305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86978357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4700 + ... + 14001.

It is an arithmetic number, because the mean of its divisors is an integer number (21750426).

Almost surely, 2^86978351 is an apocalyptic number.

86978351 is a deficient number, since it is larger than the sum of its proper divisors (23353).

86978351 is a wasteful number, since it uses less digits than its factorization.

86978351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23352.

The product of its digits is 362880, while the sum is 47.

The square root of 86978351 is about 9326.2184726715. The cubic root of 86978351 is about 443.0680051931.

The spelling of 86978351 in words is "eighty-six million, nine hundred seventy-eight thousand, three hundred fifty-one".