15249893 has 2 divisors, whose sum is σ = 15249894. Its totient is φ = 15249892.

The previous prime is 15249887. The next prime is 15249917. The reversal of 15249893 is 39894251.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10510564 + 4739329 = 3242^2 + 2177^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15249893 is a prime.

It is a super-2 number, since 2×15249893² = 465118473022898, which contains 22 as substring.

It is a Sophie Germain 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 15249893.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15249193) 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, 7624946 + 7624947.

It is an arithmetic number, because the mean of its divisors is an integer number (7624947).

Almost surely, 2^15249893 is an apocalyptic number.

It is an amenable number.

15249893 is a deficient number, since it is larger than the sum of its proper divisors (1).

15249893 is an equidigital number, since it uses as much as digits as its factorization.

15249893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 41.

The square root of 15249893 is about 3905.1111379831. Note that the first 4 decimals coincide. The cubic root of 15249893 is about 247.9832032068.

The spelling of 15249893 in words is "fifteen million, two hundred forty-nine thousand, eight hundred ninety-three".