79294921 has 2 divisors, whose sum is σ = 79294922. Its totient is φ = 79294920.

The previous prime is 79294909. The next prime is 79294981. The reversal of 79294921 is 12949297.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68641225 + 10653696 = 8285^2 + 3264^2 .

It is a cyclic number.

It is not a de Polignac number, because 79294921 - 2⁵ = 79294889 is a prime.

It is not a weakly prime, because it can be changed into another prime (79294981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39647460 + 39647461.

It is an arithmetic number, because the mean of its divisors is an integer number (39647461).

Almost surely, 2^79294921 is an apocalyptic number.

It is an amenable number.

79294921 is a deficient number, since it is larger than the sum of its proper divisors (1).

79294921 is an equidigital number, since it uses as much as digits as its factorization.

79294921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 43.

The square root of 79294921 is about 8904.7695646771. The cubic root of 79294921 is about 429.6173285591.

The spelling of 79294921 in words is "seventy-nine million, two hundred ninety-four thousand, nine hundred twenty-one".