13239993 has 16 divisors (see below), whose sum is σ = 19120640. Its totient is φ = 8100864.

The previous prime is 13239949. The next prime is 13239997. The reversal of 13239993 is 39993231.

It is not a de Polignac number, because 13239993 - 2¹⁶ = 13174457 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13239997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6648 + ... + 8406.

It is an arithmetic number, because the mean of its divisors is an integer number (1195040).

Almost surely, 2^13239993 is an apocalyptic number.

13239993 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

13239993 is a deficient number, since it is larger than the sum of its proper divisors (5880647).

13239993 is a wasteful number, since it uses less digits than its factorization.

13239993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1968.

The product of its digits is 39366, while the sum is 39.

The square root of 13239993 is about 3638.6801178449. The cubic root of 13239993 is about 236.5715880287.

The spelling of 13239993 in words is "thirteen million, two hundred thirty-nine thousand, nine hundred ninety-three".