79974863 has 2 divisors, whose sum is σ = 79974864. Its totient is φ = 79974862.

The previous prime is 79974859. The next prime is 79974877. The reversal of 79974863 is 36847997.

It is a weak prime.

It is an emirp because it is prime and its reverse (36847997) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79974863 - 2² = 79974859 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79974803) 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, 39987431 + 39987432.

It is an arithmetic number, because the mean of its divisors is an integer number (39987432).

Almost surely, 2^79974863 is an apocalyptic number.

79974863 is a deficient number, since it is larger than the sum of its proper divisors (1).

79974863 is an equidigital number, since it uses as much as digits as its factorization.

79974863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2286144, while the sum is 53.

The square root of 79974863 is about 8942.8665985801. The cubic root of 79974863 is about 430.8418032581.

The spelling of 79974863 in words is "seventy-nine million, nine hundred seventy-four thousand, eight hundred sixty-three".