239992081 has 16 divisors (see below), whose sum is σ = 284486400. Its totient is φ = 198088128.

The previous prime is 239992069. The next prime is 239992091. The reversal of 239992081 is 180299932.

It is not a de Polignac number, because 239992081 - 2²¹ = 237894929 is a prime.

It is a super-2 number, since 2×239992081² = 115192397885421122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (239992061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87771 + ... + 90463.

It is an arithmetic number, because the mean of its divisors is an integer number (17780400).

Almost surely, 2^239992081 is an apocalyptic number.

It is an amenable number.

239992081 is a deficient number, since it is larger than the sum of its proper divisors (44494319).

239992081 is a wasteful number, since it uses less digits than its factorization.

239992081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3168.

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 239992081 is about 15491.6777980953. The cubic root of 239992081 is about 621.4396660672.

The spelling of 239992081 in words is "two hundred thirty-nine million, nine hundred ninety-two thousand, eighty-one".