995783344921 has 4 divisors (see below), whose sum is σ = 995785553844. Its totient is φ = 995781136000.

The previous prime is 995783344883. The next prime is 995783344931. The reversal of 995783344921 is 129443387599.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 666490999321 + 329292345600 = 816389^2 + 573840^2 .

It is a 3-Lehmer number, since φ(995783344921) divides (995783344921-1)³.

It is a cyclic number.

It is not a de Polignac number, because 995783344921 - 2³⁷ = 858344391449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (995783344931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157780 + ... + 1420021.

It is an arithmetic number, because the mean of its divisors is an integer number (248946388461).

Almost surely, 2^995783344921 is an apocalyptic number.

995783344921 is the 631121-st heptagonal number.

It is an amenable number.

995783344921 is a deficient number, since it is larger than the sum of its proper divisors (2208923).

995783344921 is a wasteful number, since it uses less digits than its factorization.

995783344921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2208922.

The product of its digits is 58786560, while the sum is 64.

The spelling of 995783344921 in words is "nine hundred ninety-five billion, seven hundred eighty-three million, three hundred forty-four thousand, nine hundred twenty-one".