15039949 has 2 divisors, whose sum is σ = 15039950. Its totient is φ = 15039948.

The previous prime is 15039943. The next prime is 15039967. The reversal of 15039949 is 94993051.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8305924 + 6734025 = 2882^2 + 2595^2 .

It is an emirp because it is prime and its reverse (94993051) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15039949 - 2¹⁹ = 14515661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15039943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7519974 + 7519975.

It is an arithmetic number, because the mean of its divisors is an integer number (7519975).

Almost surely, 2^15039949 is an apocalyptic number.

It is an amenable number.

15039949 is a deficient number, since it is larger than the sum of its proper divisors (1).

15039949 is an equidigital number, since it uses as much as digits as its factorization.

15039949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43740, while the sum is 40.

The square root of 15039949 is about 3878.1373106170. The cubic root of 15039949 is about 246.8399527025.

The spelling of 15039949 in words is "fifteen million, thirty-nine thousand, nine hundred forty-nine".