78700973 has 8 divisors (see below), whose sum is σ = 89740728. Its totient is φ = 68373504.

The previous prime is 78700969. The next prime is 78700981. The reversal of 78700973 is 37900787.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 13446889 + 65254084 = 3667^2 + 8078^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78700973 - 2² = 78700969 is a prime.

It is a super-2 number, since 2×78700973² = 12387686302293458, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78700973.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78700903) 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 in 7 ways as a sum of consecutive naturals, for example, 177836 + ... + 178277.

It is an arithmetic number, because the mean of its divisors is an integer number (11217591).

Almost surely, 2^78700973 is an apocalyptic number.

It is an amenable number.

78700973 is a deficient number, since it is larger than the sum of its proper divisors (11039755).

78700973 is a wasteful number, since it uses less digits than its factorization.

78700973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356143.

The product of its (nonzero) digits is 74088, while the sum is 41.

The square root of 78700973 is about 8871.3568860688. The cubic root of 78700973 is about 428.5419754309.

The spelling of 78700973 in words is "seventy-eight million, seven hundred thousand, nine hundred seventy-three".