989925623 has 8 divisors (see below), whose sum is σ = 1049110128. Its totient is φ = 930847104.

The previous prime is 989925571. The next prime is 989925749. The reversal of 989925623 is 326529989.

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

It is not a de Polignac number, because 989925623 - 2⁸ = 989925367 is a prime.

It is a super-3 number, since 3×989925623³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989925323) 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, 6836 + ... + 45017.

It is an arithmetic number, because the mean of its divisors is an integer number (131138766).

Almost surely, 2^989925623 is an apocalyptic number.

989925623 is a deficient number, since it is larger than the sum of its proper divisors (59184505).

989925623 is a wasteful number, since it uses less digits than its factorization.

989925623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52993.

The product of its digits is 2099520, while the sum is 53.

The square root of 989925623 is about 31463.0834947880. The cubic root of 989925623 is about 996.6305337823.

The spelling of 989925623 in words is "nine hundred eighty-nine million, nine hundred twenty-five thousand, six hundred twenty-three".