116989521 has 32 divisors (see below), whose sum is σ = 175167360. Its totient is φ = 68851200.

The previous prime is 116989511. The next prime is 116989547. The reversal of 116989521 is 125989611.

It is a de Polignac number, because none of the positive numbers 2^k-116989521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (116989511) 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, 178831 + ... + 179483.

It is an arithmetic number, because the mean of its divisors is an integer number (5473980).

Almost surely, 2^116989521 is an apocalyptic number.

116989521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

116989521 is a deficient number, since it is larger than the sum of its proper divisors (58177839).

116989521 is a wasteful number, since it uses less digits than its factorization.

116989521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 817.

The product of its digits is 38880, while the sum is 42.

The square root of 116989521 is about 10816.1694235991. The cubic root of 116989521 is about 489.0827223606.

The spelling of 116989521 in words is "one hundred sixteen million, nine hundred eighty-nine thousand, five hundred twenty-one".