79051997 has 2 divisors, whose sum is σ = 79051998. Its totient is φ = 79051996.

The previous prime is 79051969. The next prime is 79052009. The reversal of 79051997 is 79915097.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79049881 + 2116 = 8891^2 + 46^2 .

It is a cyclic number.

It is not a de Polignac number, because 79051997 - 2⁸ = 79051741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79051957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39525998 + 39525999.

It is an arithmetic number, because the mean of its divisors is an integer number (39525999).

Almost surely, 2^79051997 is an apocalyptic number.

It is an amenable number.

79051997 is a deficient number, since it is larger than the sum of its proper divisors (1).

79051997 is an equidigital number, since it uses as much as digits as its factorization.

79051997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 178605, while the sum is 47.

The square root of 79051997 is about 8891.1189959420. The cubic root of 79051997 is about 429.1781616468.

The spelling of 79051997 in words is "seventy-nine million, fifty-one thousand, nine hundred ninety-seven".