79804945 has 12 divisors (see below), whose sum is σ = 105264180. Its totient is φ = 58039520.

The previous prime is 79804939. The next prime is 79804951. The reversal of 79804945 is 54940897.

It is an interprime number because it is at equal distance from previous prime (79804939) and next prime (79804951).

It can be written as a sum of positive squares in 2 ways, for example, as 43996689 + 35808256 = 6633^2 + 5984^2 .

It is not a de Polignac number, because 79804945 - 2³ = 79804937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 79804895 and 79804904.

It is an unprimeable number.

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 in 11 ways as a sum of consecutive naturals, for example, 65350 + ... + 66559.

It is an arithmetic number, because the mean of its divisors is an integer number (8772015).

Almost surely, 2^79804945 is an apocalyptic number.

It is an amenable number.

79804945 is a deficient number, since it is larger than the sum of its proper divisors (25459235).

79804945 is a wasteful number, since it uses less digits than its factorization.

79804945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131936 (or 131925 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 46.

The square root of 79804945 is about 8933.3613494586. The cubic root of 79804945 is about 430.5364586250.

The spelling of 79804945 in words is "seventy-nine million, eight hundred four thousand, nine hundred forty-five".