79679381 has 2 divisors, whose sum is σ = 79679382. Its totient is φ = 79679380.

The previous prime is 79679371. The next prime is 79679423. The reversal of 79679381 is 18397697.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66422500 + 13256881 = 8150^2 + 3641^2 .

It is a cyclic number.

It is not a de Polignac number, because 79679381 - 2⁶ = 79679317 is a prime.

It is a super-2 number, since 2×79679381² = 12697607513086322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79679311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39839690 + 39839691.

It is an arithmetic number, because the mean of its divisors is an integer number (39839691).

Almost surely, 2^79679381 is an apocalyptic number.

It is an amenable number.

79679381 is a deficient number, since it is larger than the sum of its proper divisors (1).

79679381 is an equidigital number, since it uses as much as digits as its factorization.

79679381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 571536, while the sum is 50.

The square root of 79679381 is about 8926.3307691347. The cubic root of 79679381 is about 430.3105400554.

The spelling of 79679381 in words is "seventy-nine million, six hundred seventy-nine thousand, three hundred eighty-one".