816612929 has 4 divisors (see below), whose sum is σ = 890850480. Its totient is φ = 742375380.

The previous prime is 816612899. The next prime is 816612947. The reversal of 816612929 is 929216618.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 816612929 - 2¹⁶ = 816547393 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 816612929.

It is not an unprimeable number, because it can be changed into a prime (816612029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37118759 + ... + 37118780.

It is an arithmetic number, because the mean of its divisors is an integer number (222712620).

Almost surely, 2^816612929 is an apocalyptic number.

It is an amenable number.

816612929 is a deficient number, since it is larger than the sum of its proper divisors (74237551).

816612929 is a wasteful number, since it uses less digits than its factorization.

816612929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74237550.

The product of its digits is 93312, while the sum is 44.

The square root of 816612929 is about 28576.4401036938. The cubic root of 816612929 is about 934.6996581740.

The spelling of 816612929 in words is "eight hundred sixteen million, six hundred twelve thousand, nine hundred twenty-nine".