86978269 has 4 divisors (see below), whose sum is σ = 99403744. Its totient is φ = 74552796.

The previous prime is 86978233. The next prime is 86978299. The reversal of 86978269 is 96287968.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 86978269 - 2²⁵ = 53423837 is a prime.

It is a super-2 number, since 2×86978269² = 15130438556472722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86978299) 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, 6212727 + ... + 6212740.

It is an arithmetic number, because the mean of its divisors is an integer number (24850936).

Almost surely, 2^86978269 is an apocalyptic number.

It is an amenable number.

86978269 is a deficient number, since it is larger than the sum of its proper divisors (12425475).

86978269 is a wasteful number, since it uses less digits than its factorization.

86978269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12425474.

The product of its digits is 2612736, while the sum is 55.

The square root of 86978269 is about 9326.2140764621. The cubic root of 86978269 is about 443.0678659570.

The spelling of 86978269 in words is "eighty-six million, nine hundred seventy-eight thousand, two hundred sixty-nine".