79963649 has 2 divisors, whose sum is σ = 79963650. Its totient is φ = 79963648.

The previous prime is 79963627. The next prime is 79963657. The reversal of 79963649 is 94636997.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74511424 + 5452225 = 8632^2 + 2335^2 .

It is a cyclic number.

It is not a de Polignac number, because 79963649 - 2²⁰ = 78915073 is a prime.

It is a super-2 number, since 2×79963649² = 12788370322790402, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 79963649.

It is not a weakly prime, because it can be changed into another prime (79963669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39981824 + 39981825.

It is an arithmetic number, because the mean of its divisors is an integer number (39981825).

Almost surely, 2^79963649 is an apocalyptic number.

It is an amenable number.

79963649 is a deficient number, since it is larger than the sum of its proper divisors (1).

79963649 is an equidigital number, since it uses as much as digits as its factorization.

79963649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2204496, while the sum is 53.

The square root of 79963649 is about 8942.2395964322. The cubic root of 79963649 is about 430.8216649061.

The spelling of 79963649 in words is "seventy-nine million, nine hundred sixty-three thousand, six hundred forty-nine".