815604799 has 2 divisors, whose sum is σ = 815604800. Its totient is φ = 815604798.

The previous prime is 815604793. The next prime is 815604827. The reversal of 815604799 is 997406518.

815604799 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 815604799 - 2³ = 815604791 is a prime.

It is a super-2 number, since 2×815604799² = 1330422376303660802, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (815604791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 407802399 + 407802400.

It is an arithmetic number, because the mean of its divisors is an integer number (407802400).

Almost surely, 2^815604799 is an apocalyptic number.

815604799 is a deficient number, since it is larger than the sum of its proper divisors (1).

815604799 is an equidigital number, since it uses as much as digits as its factorization.

815604799 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 544320, while the sum is 49.

The square root of 815604799 is about 28558.7954752997. The cubic root of 815604799 is about 934.3148627329.

The spelling of 815604799 in words is "eight hundred fifteen million, six hundred four thousand, seven hundred ninety-nine".