15399983 has 2 divisors, whose sum is σ = 15399984. Its totient is φ = 15399982.

The previous prime is 15399959. The next prime is 15399997. The reversal of 15399983 is 38999351.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15399983 - 2¹⁰ = 15398959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15399383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7699991 + 7699992.

It is an arithmetic number, because the mean of its divisors is an integer number (7699992).

Almost surely, 2^15399983 is an apocalyptic number.

15399983 is a deficient number, since it is larger than the sum of its proper divisors (1).

15399983 is an equidigital number, since it uses as much as digits as its factorization.

15399983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 262440, while the sum is 47.

The square root of 15399983 is about 3924.2812080686. The cubic root of 15399983 is about 248.7941019252.

The spelling of 15399983 in words is "fifteen million, three hundred ninety-nine thousand, nine hundred eighty-three".