989930631 has 32 divisors (see below), whose sum is σ = 1402053120. Its totient is φ = 620323200.

The previous prime is 989930629. The next prime is 989930651. The reversal of 989930631 is 136039989.

It is a happy number.

It is not a de Polignac number, because 989930631 - 2¹ = 989930629 is a prime.

It is a super-4 number, since 4×989930631⁴ (a number of 37 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989930651) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 545716 + ... + 547526.

It is an arithmetic number, because the mean of its divisors is an integer number (43814160).

Almost surely, 2^989930631 is an apocalyptic number.

989930631 is a deficient number, since it is larger than the sum of its proper divisors (412122489).

989930631 is a wasteful number, since it uses less digits than its factorization.

989930631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2007.

The product of its (nonzero) digits is 314928, while the sum is 48.

The square root of 989930631 is about 31463.1630800211. The cubic root of 989930631 is about 996.6322144194.

The spelling of 989930631 in words is "nine hundred eighty-nine million, nine hundred thirty thousand, six hundred thirty-one".