996628649 has 4 divisors (see below), whose sum is σ = 1013520720. Its totient is φ = 979736580.

The previous prime is 996628639. The next prime is 996628681. The reversal of 996628649 is 946826699.

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 a de Polignac number, because none of the positive numbers 2^k-996628649 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (59), and also a Moran number because the ratio is a prime number: 16892011 = 996628649 / (9 + 9 + 6 + 6 + 2 + 8 + 6 + 4 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (996628639) 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 3 ways as a sum of consecutive naturals, for example, 8445947 + ... + 8446064.

It is an arithmetic number, because the mean of its divisors is an integer number (253380180).

Almost surely, 2^996628649 is an apocalyptic number.

It is an amenable number.

996628649 is a deficient number, since it is larger than the sum of its proper divisors (16892071).

996628649 is a wasteful number, since it uses less digits than its factorization.

996628649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16892070.

The product of its digits is 10077696, while the sum is 59.

The square root of 996628649 is about 31569.4258579405. The cubic root of 996628649 is about 998.8749510729.

The spelling of 996628649 in words is "nine hundred ninety-six million, six hundred twenty-eight thousand, six hundred forty-nine".