56778199 has 2 divisors, whose sum is σ = 56778200. Its totient is φ = 56778198.

The previous prime is 56778193. The next prime is 56778217. The reversal of 56778199 is 99187765.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56778199 - 2⁵ = 56778167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56778193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28389099 + 28389100.

It is an arithmetic number, because the mean of its divisors is an integer number (28389100).

Almost surely, 2^56778199 is an apocalyptic number.

56778199 is a deficient number, since it is larger than the sum of its proper divisors (1).

56778199 is an equidigital number, since it uses as much as digits as its factorization.

56778199 is an evil number, because the sum of its binary digits is even.

The product of its digits is 952560, while the sum is 52.

The square root of 56778199 is about 7535.1309875808. The cubic root of 56778199 is about 384.3502821393.

The spelling of 56778199 in words is "fifty-six million, seven hundred seventy-eight thousand, one hundred ninety-nine".