78107873 has 2 divisors, whose sum is σ = 78107874. Its totient is φ = 78107872.

The previous prime is 78107857. The next prime is 78107893. The reversal of 78107873 is 37870187.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61199329 + 16908544 = 7823^2 + 4112^2 .

It is a cyclic number.

It is not a de Polignac number, because 78107873 - 2⁴ = 78107857 is a prime.

It is a super-2 number, since 2×78107873² = 12201679649168258, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78107873.

It is not a weakly prime, because it can be changed into another prime (78107893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39053936 + 39053937.

It is an arithmetic number, because the mean of its divisors is an integer number (39053937).

Almost surely, 2^78107873 is an apocalyptic number.

It is an amenable number.

78107873 is a deficient number, since it is larger than the sum of its proper divisors (1).

78107873 is an equidigital number, since it uses as much as digits as its factorization.

78107873 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 65856, while the sum is 41.

The square root of 78107873 is about 8837.8658622996. The cubic root of 78107873 is about 427.4627451775.

The spelling of 78107873 in words is "seventy-eight million, one hundred seven thousand, eight hundred seventy-three".