989959537 has 16 divisors (see below), whose sum is σ = 1182677760. Its totient is φ = 810196992.

The previous prime is 989959511. The next prime is 989959561. The reversal of 989959537 is 735959989.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 989959537 - 2²³ = 981570929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (989959577) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90289 + ... + 100657.

It is an arithmetic number, because the mean of its divisors is an integer number (73917360).

Almost surely, 2^989959537 is an apocalyptic number.

It is an amenable number.

989959537 is a deficient number, since it is larger than the sum of its proper divisors (192718223).

989959537 is a wasteful number, since it uses less digits than its factorization.

989959537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10992.

The product of its digits is 27556200, while the sum is 64.

The square root of 989959537 is about 31463.6224392551. The cubic root of 989959537 is about 996.6419148871.

The spelling of 989959537 in words is "nine hundred eighty-nine million, nine hundred fifty-nine thousand, five hundred thirty-seven".