79876961 has 4 divisors (see below), whose sum is σ = 80667924. Its totient is φ = 79086000.

The previous prime is 79876949. The next prime is 79876967. The reversal of 79876961 is 16967897.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16967897 = 53 ⋅320149.

It can be written as a sum of positive squares in 2 ways, for example, as 64705936 + 15171025 = 8044^2 + 3895^2 .

It is a cyclic number.

It is not a de Polignac number, because 79876961 - 2¹⁸ = 79614817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79876967) 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, 395330 + ... + 395531.

It is an arithmetic number, because the mean of its divisors is an integer number (20166981).

Almost surely, 2^79876961 is an apocalyptic number.

It is an amenable number.

79876961 is a deficient number, since it is larger than the sum of its proper divisors (790963).

79876961 is a wasteful number, since it uses less digits than its factorization.

79876961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790962.

The product of its digits is 1143072, while the sum is 53.

The square root of 79876961 is about 8937.3911741626. The cubic root of 79876961 is about 430.6659250877.

The spelling of 79876961 in words is "seventy-nine million, eight hundred seventy-six thousand, nine hundred sixty-one".