79563641 has 2 divisors, whose sum is σ = 79563642. Its totient is φ = 79563640.

The previous prime is 79563637. The next prime is 79563667. The reversal of 79563641 is 14636597.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64963600 + 14600041 = 8060^2 + 3821^2 .

It is an emirp because it is prime and its reverse (14636597) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79563641 - 2² = 79563637 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (79563611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39781820 + 39781821.

It is an arithmetic number, because the mean of its divisors is an integer number (39781821).

Almost surely, 2^79563641 is an apocalyptic number.

It is an amenable number.

79563641 is a deficient number, since it is larger than the sum of its proper divisors (1).

79563641 is an equidigital number, since it uses as much as digits as its factorization.

79563641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 41.

The square root of 79563641 is about 8919.8453461929. The cubic root of 79563641 is about 430.1020868125.

The spelling of 79563641 in words is "seventy-nine million, five hundred sixty-three thousand, six hundred forty-one".