79650013 has 2 divisors, whose sum is σ = 79650014. Its totient is φ = 79650012.

The previous prime is 79649993. The next prime is 79650023. The reversal of 79650013 is 31005697.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74183769 + 5466244 = 8613^2 + 2338^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79650013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79650023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39825006 + 39825007.

It is an arithmetic number, because the mean of its divisors is an integer number (39825007).

Almost surely, 2^79650013 is an apocalyptic number.

It is an amenable number.

79650013 is a deficient number, since it is larger than the sum of its proper divisors (1).

79650013 is an equidigital number, since it uses as much as digits as its factorization.

79650013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5670, while the sum is 31.

The square root of 79650013 is about 8924.6855967031. The cubic root of 79650013 is about 430.2576660132.

Subtracting from 79650013 its reverse (31005697), we obtain a triangular number (48644316 = T₉₈₆₃).

The spelling of 79650013 in words is "seventy-nine million, six hundred fifty thousand, thirteen".