78769231 has 8 divisors (see below), whose sum is σ = 83012720. Its totient is φ = 74535552.

The previous prime is 78769219. The next prime is 78769237. The reversal of 78769231 is 13296787.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 78769231 - 2⁵ = 78769199 is a prime.

It is a super-2 number, since 2×78769231² = 12409183504662722, 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 (78769237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18871 + ... + 22663.

It is an arithmetic number, because the mean of its divisors is an integer number (10376590).

Almost surely, 2^78769231 is an apocalyptic number.

78769231 is a deficient number, since it is larger than the sum of its proper divisors (4243489).

78769231 is a wasteful number, since it uses less digits than its factorization.

78769231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4905.

The product of its digits is 127008, while the sum is 43.

The square root of 78769231 is about 8875.2031526045. The cubic root of 78769231 is about 428.6658322883.

The spelling of 78769231 in words is "seventy-eight million, seven hundred sixty-nine thousand, two hundred thirty-one".