79840807 has 2 divisors, whose sum is σ = 79840808. Its totient is φ = 79840806.

The previous prime is 79840801. The next prime is 79840829. The reversal of 79840807 is 70804897.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 79840807 - 2¹⁵ = 79808039 is a prime.

It is a super-2 number, since 2×79840807² = 12749108924822498, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79840801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39920403 + 39920404.

It is an arithmetic number, because the mean of its divisors is an integer number (39920404).

Almost surely, 2^79840807 is an apocalyptic number.

79840807 is a deficient number, since it is larger than the sum of its proper divisors (1).

79840807 is an equidigital number, since it uses as much as digits as its factorization.

79840807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112896, while the sum is 43.

The square root of 79840807 is about 8935.3683192133. The cubic root of 79840807 is about 430.6009391168.

The spelling of 79840807 in words is "seventy-nine million, eight hundred forty thousand, eight hundred seven".