79149997 has 2 divisors, whose sum is σ = 79149998. Its totient is φ = 79149996.

The previous prime is 79149989. The next prime is 79150003. The reversal of 79149997 is 79994197.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76545001 + 2604996 = 8749^2 + 1614^2 .

It is a cyclic number.

It is not a de Polignac number, because 79149997 - 2³ = 79149989 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79149937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39574998 + 39574999.

It is an arithmetic number, because the mean of its divisors is an integer number (39574999).

Almost surely, 2^79149997 is an apocalyptic number.

It is an amenable number.

79149997 is a deficient number, since it is larger than the sum of its proper divisors (1).

79149997 is an equidigital number, since it uses as much as digits as its factorization.

79149997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1285956, while the sum is 55.

The square root of 79149997 is about 8896.6284063121. The cubic root of 79149997 is about 429.3554377569.

The spelling of 79149997 in words is "seventy-nine million, one hundred forty-nine thousand, nine hundred ninety-seven".