995659721 has 4 divisors (see below), whose sum is σ = 1137896832. Its totient is φ = 853422612.

The previous prime is 995659667. The next prime is 995659729. The reversal of 995659721 is 127956599.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 127956599 = 467 ⋅273997.

It is not a de Polignac number, because 995659721 - 2¹⁸ = 995397577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (995659729) 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, 71118545 + ... + 71118558.

It is an arithmetic number, because the mean of its divisors is an integer number (284474208).

Almost surely, 2^995659721 is an apocalyptic number.

It is an amenable number.

995659721 is a deficient number, since it is larger than the sum of its proper divisors (142237111).

995659721 is a wasteful number, since it uses less digits than its factorization.

995659721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142237110.

The product of its digits is 1530900, while the sum is 53.

The square root of 995659721 is about 31554.0761392249. The cubic root of 995659721 is about 998.5511421581.

The spelling of 995659721 in words is "nine hundred ninety-five million, six hundred fifty-nine thousand, seven hundred twenty-one".