79311949 has 2 divisors, whose sum is σ = 79311950. Its totient is φ = 79311948.

The previous prime is 79311929. The next prime is 79311959. The reversal of 79311949 is 94911397.

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., 61308900 + 18003049 = 7830^2 + 4243^2 .

It is a cyclic number.

It is not a de Polignac number, because 79311949 - 2⁷ = 79311821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79311929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39655974 + 39655975.

It is an arithmetic number, because the mean of its divisors is an integer number (39655975).

Almost surely, 2^79311949 is an apocalyptic number.

It is an amenable number.

79311949 is a deficient number, since it is larger than the sum of its proper divisors (1).

79311949 is an equidigital number, since it uses as much as digits as its factorization.

79311949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 61236, while the sum is 43.

The square root of 79311949 is about 8905.7256301775. The cubic root of 79311949 is about 429.6480787433.

The spelling of 79311949 in words is "seventy-nine million, three hundred eleven thousand, nine hundred forty-nine".