79978263 has 4 divisors (see below), whose sum is σ = 106637688. Its totient is φ = 53318840.

The previous prime is 79978231. The next prime is 79978267. The reversal of 79978263 is 36287997.

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 79978263 - 2⁵ = 79978231 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79978267) 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, 13329708 + ... + 13329713.

It is an arithmetic number, because the mean of its divisors is an integer number (26659422).

Almost surely, 2^79978263 is an apocalyptic number.

79978263 is a deficient number, since it is larger than the sum of its proper divisors (26659425).

79978263 is a wasteful number, since it uses less digits than its factorization.

79978263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26659424.

The product of its digits is 1143072, while the sum is 51.

The square root of 79978263 is about 8943.0566922054. The cubic root of 79978263 is about 430.8479086822.

The spelling of 79978263 in words is "seventy-nine million, nine hundred seventy-eight thousand, two hundred sixty-three".