15149999 has 2 divisors, whose sum is σ = 15150000. Its totient is φ = 15149998.

The previous prime is 15149993. The next prime is 15150001. The reversal of 15149999 is 99994151.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15149999 - 2¹⁶ = 15084463 is a prime.

It is a Sophie Germain prime.

Together with 15150001, it forms a pair of twin primes.

It is a Chen prime.

15149999 is a modest number, since divided by 9999 gives 1514 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15149993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7574999 + 7575000.

It is an arithmetic number, because the mean of its divisors is an integer number (7575000).

Almost surely, 2^15149999 is an apocalyptic number.

15149999 is a deficient number, since it is larger than the sum of its proper divisors (1).

15149999 is an equidigital number, since it uses as much as digits as its factorization.

15149999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 131220, while the sum is 47.

The square root of 15149999 is about 3892.2999627470. The cubic root of 15149999 is about 247.4405475674.

The spelling of 15149999 in words is "fifteen million, one hundred forty-nine thousand, nine hundred ninety-nine".