996520731 has 8 divisors (see below), whose sum is σ = 1329941520. Its totient is φ = 663723552.

The previous prime is 996520727. The next prime is 996520753. The reversal of 996520731 is 137025699.

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

It is not a de Polignac number, because 996520731 - 2² = 996520727 is a prime.

It is a super-3 number, since 3×996520731³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (996520711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152160 + ... + 158573.

It is an arithmetic number, because the mean of its divisors is an integer number (166242690).

Almost surely, 2^996520731 is an apocalyptic number.

996520731 is a deficient number, since it is larger than the sum of its proper divisors (333420789).

996520731 is a wasteful number, since it uses less digits than its factorization.

996520731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311805.

The product of its (nonzero) digits is 102060, while the sum is 42.

The square root of 996520731 is about 31567.7165946478. The cubic root of 996520731 is about 998.8388960260.

The spelling of 996520731 in words is "nine hundred ninety-six million, five hundred twenty thousand, seven hundred thirty-one".