996721995 has 8 divisors (see below), whose sum is σ = 1594755216. Its totient is φ = 531585056.

The previous prime is 996721981. The next prime is 996722009. The reversal of 996721995 is 599127699.

It is an interprime number because it is at equal distance from previous prime (996721981) and next prime (996722009).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 996721995 - 2⁵ = 996721963 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33224052 + ... + 33224081.

It is an arithmetic number, because the mean of its divisors is an integer number (199344402).

Almost surely, 2^996721995 is an apocalyptic number.

996721995 is a deficient number, since it is larger than the sum of its proper divisors (598033221).

996721995 is a wasteful number, since it uses less digits than its factorization.

996721995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66448141.

The product of its digits is 2755620, while the sum is 57.

The square root of 996721995 is about 31570.9042474238. The cubic root of 996721995 is about 998.9061355635.

The spelling of 996721995 in words is "nine hundred ninety-six million, seven hundred twenty-one thousand, nine hundred ninety-five".