239908081 has 4 divisors (see below), whose sum is σ = 274180672. Its totient is φ = 205635492.

The previous prime is 239908061. The next prime is 239908099. The reversal of 239908081 is 180809932.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 239908081 - 2¹¹ = 239906033 is a prime.

It is a super-2 number, since 2×239908081² = 115111774658205122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (239908061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17136285 + ... + 17136298.

It is an arithmetic number, because the mean of its divisors is an integer number (68545168).

Almost surely, 2^239908081 is an apocalyptic number.

It is an amenable number.

239908081 is a deficient number, since it is larger than the sum of its proper divisors (34272591).

239908081 is an equidigital number, since it uses as much as digits as its factorization.

239908081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34272590.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 239908081 is about 15488.9664277511. The cubic root of 239908081 is about 621.3671539198.

The spelling of 239908081 in words is "two hundred thirty-nine million, nine hundred eight thousand, eighty-one".