79253989 has 2 divisors, whose sum is σ = 79253990. Its totient is φ = 79253988.

The previous prime is 79253971. The next prime is 79254053. The reversal of 79253989 is 98935297.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78021889 + 1232100 = 8833^2 + 1110^2 .

It is a cyclic number.

It is not a de Polignac number, because 79253989 - 2⁹ = 79253477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79253789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39626994 + 39626995.

It is an arithmetic number, because the mean of its divisors is an integer number (39626995).

Almost surely, 2^79253989 is an apocalyptic number.

It is an amenable number.

79253989 is a deficient number, since it is larger than the sum of its proper divisors (1).

79253989 is an equidigital number, since it uses as much as digits as its factorization.

79253989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1224720, while the sum is 52.

The square root of 79253989 is about 8902.4709491242. The cubic root of 79253989 is about 429.5433930832.

The spelling of 79253989 in words is "seventy-nine million, two hundred fifty-three thousand, nine hundred eighty-nine".