15137989 has 2 divisors, whose sum is σ = 15137990. Its totient is φ = 15137988.

The previous prime is 15137987. The next prime is 15137999. The reversal of 15137989 is 98973151.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14250625 + 887364 = 3775^2 + 942^2 .

It is an emirp because it is prime and its reverse (98973151) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15137989 - 2¹ = 15137987 is a prime.

Together with 15137987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15137987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7568994 + 7568995.

It is an arithmetic number, because the mean of its divisors is an integer number (7568995).

Almost surely, 2^15137989 is an apocalyptic number.

It is an amenable number.

15137989 is a deficient number, since it is larger than the sum of its proper divisors (1).

15137989 is an equidigital number, since it uses as much as digits as its factorization.

15137989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68040, while the sum is 43.

The square root of 15137989 is about 3890.7568672432. The cubic root of 15137989 is about 247.3751449976.

The spelling of 15137989 in words is "fifteen million, one hundred thirty-seven thousand, nine hundred eighty-nine".