15424993 has 2 divisors, whose sum is σ = 15424994. Its totient is φ = 15424992.

The previous prime is 15424991. The next prime is 15425027. The reversal of 15424993 is 39942451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9437184 + 5987809 = 3072^2 + 2447^2 .

It is an emirp because it is prime and its reverse (39942451) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15424993 - 2¹ = 15424991 is a prime.

Together with 15424991, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (15424991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7712496 + 7712497.

It is an arithmetic number, because the mean of its divisors is an integer number (7712497).

Almost surely, 2^15424993 is an apocalyptic number.

It is an amenable number.

15424993 is a deficient number, since it is larger than the sum of its proper divisors (1).

15424993 is an equidigital number, since it uses as much as digits as its factorization.

15424993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 37.

The square root of 15424993 is about 3927.4664861715. The cubic root of 15424993 is about 248.9287119246.

The spelling of 15424993 in words is "fifteen million, four hundred twenty-four thousand, nine hundred ninety-three".