15940049 has 2 divisors, whose sum is σ = 15940050. Its totient is φ = 15940048.

The previous prime is 15940027. The next prime is 15940073. The reversal of 15940049 is 94004951.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8880400 + 7059649 = 2980^2 + 2657^2 .

It is a cyclic number.

It is not a de Polignac number, because 15940049 - 2⁸ = 15939793 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 15939997 and 15940024.

It is not a weakly prime, because it can be changed into another prime (15940009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7970024 + 7970025.

It is an arithmetic number, because the mean of its divisors is an integer number (7970025).

Almost surely, 2^15940049 is an apocalyptic number.

It is an amenable number.

15940049 is a deficient number, since it is larger than the sum of its proper divisors (1).

15940049 is an equidigital number, since it uses as much as digits as its factorization.

15940049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 15940049 is about 3992.4990920475. The cubic root of 15940049 is about 251.6690930476.

The spelling of 15940049 in words is "fifteen million, nine hundred forty thousand, forty-nine".