815604463 has 2 divisors, whose sum is σ = 815604464. Its totient is φ = 815604462.

The previous prime is 815604373. The next prime is 815604499. The reversal of 815604463 is 364406518.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 815604463 - 2²¹ = 813507311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (815604763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 407802231 + 407802232.

It is an arithmetic number, because the mean of its divisors is an integer number (407802232).

Almost surely, 2^815604463 is an apocalyptic number.

815604463 is a deficient number, since it is larger than the sum of its proper divisors (1).

815604463 is an equidigital number, since it uses as much as digits as its factorization.

815604463 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 37.

The square root of 815604463 is about 28558.7895926981. The cubic root of 815604463 is about 934.3147344314.

The spelling of 815604463 in words is "eight hundred fifteen million, six hundred four thousand, four hundred sixty-three".