79453999 has 2 divisors, whose sum is σ = 79454000. Its totient is φ = 79453998.

The previous prime is 79453993. The next prime is 79454009. The reversal of 79453999 is 99935497.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 79453999 - 2⁵ = 79453967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79453993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39726999 + 39727000.

It is an arithmetic number, because the mean of its divisors is an integer number (39727000).

Almost surely, 2^79453999 is an apocalyptic number.

79453999 is a deficient number, since it is larger than the sum of its proper divisors (1).

79453999 is an equidigital number, since it uses as much as digits as its factorization.

79453999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2755620, while the sum is 55.

The square root of 79453999 is about 8913.6972688105. The cubic root of 79453999 is about 429.9044298151.

The spelling of 79453999 in words is "seventy-nine million, four hundred fifty-three thousand, nine hundred ninety-nine".