996721525 has 6 divisors (see below), whose sum is σ = 1235934722. Its totient is φ = 797377200.

The previous prime is 996721507. The next prime is 996721529. The reversal of 996721525 is 525127699.

It can be written as a sum of positive squares in 3 ways, for example, as 179104689 + 817616836 = 13383^2 + 28594^2 .

It is not a de Polignac number, because 996721525 - 2⁵ = 996721493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (996721529) 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 5 ways as a sum of consecutive naturals, for example, 19934406 + ... + 19934455.

Almost surely, 2^996721525 is an apocalyptic number.

It is an amenable number.

996721525 is a deficient number, since it is larger than the sum of its proper divisors (239213197).

996721525 is a wasteful number, since it uses less digits than its factorization.

996721525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39868871 (or 39868866 counting only the distinct ones).

The product of its digits is 340200, while the sum is 46.

The square root of 996721525 is about 31570.8968038604. The cubic root of 996721525 is about 998.9059785535.

The spelling of 996721525 in words is "nine hundred ninety-six million, seven hundred twenty-one thousand, five hundred twenty-five".