78779253 has 32 divisors (see below), whose sum is σ = 125680896. Its totient is φ = 42951168.

The previous prime is 78779237. The next prime is 78779279. The reversal of 78779253 is 35297787.

It is not a de Polignac number, because 78779253 - 2⁴ = 78779237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78779213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40225 + ... + 42137.

It is an arithmetic number, because the mean of its divisors is an integer number (3927528).

Almost surely, 2^78779253 is an apocalyptic number.

It is an amenable number.

78779253 is a deficient number, since it is larger than the sum of its proper divisors (46901643).

78779253 is a wasteful number, since it uses less digits than its factorization.

78779253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2013.

The product of its digits is 740880, while the sum is 48.

The square root of 78779253 is about 8875.7677414407. The cubic root of 78779253 is about 428.6840115813.

The spelling of 78779253 in words is "seventy-eight million, seven hundred seventy-nine thousand, two hundred fifty-three".