15384989 has 2 divisors, whose sum is σ = 15384990. Its totient is φ = 15384988.

The previous prime is 15384977. The next prime is 15384991. The reversal of 15384989 is 98948351.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12545764 + 2839225 = 3542^2 + 1685^2 .

It is a cyclic number.

It is not a de Polignac number, because 15384989 - 2⁴ = 15384973 is a prime.

Together with 15384991, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15389989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7692494 + 7692495.

It is an arithmetic number, because the mean of its divisors is an integer number (7692495).

Almost surely, 2^15384989 is an apocalyptic number.

It is an amenable number.

15384989 is a deficient number, since it is larger than the sum of its proper divisors (1).

15384989 is an equidigital number, since it uses as much as digits as its factorization.

15384989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 311040, while the sum is 47.

The square root of 15384989 is about 3922.3703292779. The cubic root of 15384989 is about 248.7133306215.

The spelling of 15384989 in words is "fifteen million, three hundred eighty-four thousand, nine hundred eighty-nine".