815689134 has 24 divisors (see below), whose sum is σ = 1903275192. Its totient is φ = 250981200.

The previous prime is 815689129. The next prime is 815689139. The reversal of 815689134 is 431986518.

815689134 is a `hidden beast` number, since 81 + 568 + 9 + 1 + 3 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (815689129) and next prime (815689139).

It is a self number, because there is not a number n which added to its sum of digits gives 815689134.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (815689139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1742692 + ... + 1743159.

It is an arithmetic number, because the mean of its divisors is an integer number (79303133).

Almost surely, 2^815689134 is an apocalyptic number.

815689134 is an abundant number, since it is smaller than the sum of its proper divisors (1087586058).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

815689134 is a wasteful number, since it uses less digits than its factorization.

815689134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3485872 (or 3485869 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The square root of 815689134 is about 28560.2719524867. The cubic root of 815689134 is about 934.3470649009.

The spelling of 815689134 in words is "eight hundred fifteen million, six hundred eighty-nine thousand, one hundred thirty-four".