15172989 has 12 divisors (see below), whose sum is σ = 21907296. Its totient is φ = 9336912.

The previous prime is 15172979. The next prime is 15172991. The reversal of 15172989 is 98927151.

It is not a de Polignac number, because 15172989 - 2¹¹ = 15170941 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 15172989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15172979) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14457 + ... + 15470.

It is an arithmetic number, because the mean of its divisors is an integer number (1825608).

Almost surely, 2^15172989 is an apocalyptic number.

It is an amenable number.

15172989 is a deficient number, since it is larger than the sum of its proper divisors (6734307).

15172989 is a wasteful number, since it uses less digits than its factorization.

15172989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29956 (or 29943 counting only the distinct ones).

The product of its digits is 45360, while the sum is 42.

The square root of 15172989 is about 3895.2521099410. The cubic root of 15172989 is about 247.5656473141.

It can be divided in two parts, 15172 and 989, that added together give a palindrome (16161).

The spelling of 15172989 in words is "fifteen million, one hundred seventy-two thousand, nine hundred eighty-nine".