239817313 has 12 divisors (see below), whose sum is σ = 247744560. Its totient is φ = 232135632.

The previous prime is 239817307. The next prime is 239817341. The reversal of 239817313 is 313718932.

It is not a de Polignac number, because 239817313 - 2¹³ = 239809121 is a prime.

It is a super-2 number, since 2×239817313² = 115024687229079938, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (239817013) 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 in 11 ways as a sum of consecutive naturals, for example, 387118 + ... + 387736.

It is an arithmetic number, because the mean of its divisors is an integer number (20645380).

Almost surely, 2^239817313 is an apocalyptic number.

It is an amenable number.

239817313 is a deficient number, since it is larger than the sum of its proper divisors (7927247).

239817313 is an equidigital number, since it uses as much as digits as its factorization.

239817313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 976 (or 939 counting only the distinct ones).

The product of its digits is 27216, while the sum is 37.

The square root of 239817313 is about 15486.0360647908. The cubic root of 239817313 is about 621.2887803361.

The spelling of 239817313 in words is "two hundred thirty-nine million, eight hundred seventeen thousand, three hundred thirteen".