78264969 has 4 divisors (see below), whose sum is σ = 104353296. Its totient is φ = 52176644.

The previous prime is 78264959. The next prime is 78264983. The reversal of 78264969 is 96946287.

It is a happy number.

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 78264969 - 2⁸ = 78264713 is a prime.

It is a super-2 number, since 2×78264969² = 12250810745141922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78264919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13044159 + ... + 13044164.

It is an arithmetic number, because the mean of its divisors is an integer number (26088324).

Almost surely, 2^78264969 is an apocalyptic number.

It is an amenable number.

78264969 is a deficient number, since it is larger than the sum of its proper divisors (26088327).

78264969 is a wasteful number, since it uses less digits than its factorization.

78264969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26088326.

The product of its digits is 1306368, while the sum is 51.

The square root of 78264969 is about 8846.7490639217. The cubic root of 78264969 is about 427.7491342202.

The spelling of 78264969 in words is "seventy-eight million, two hundred sixty-four thousand, nine hundred sixty-nine".