239897645 has 16 divisors (see below), whose sum is σ = 317235072. Its totient is φ = 173033280.

The previous prime is 239897633. The next prime is 239897681. The reversal of 239897645 is 546798932.

It is a happy number.

It is not a de Polignac number, because 239897645 - 2⁸ = 239897389 is a prime.

It is a super-3 number, since 3×239897645³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 40121 + ... + 45710.

It is an arithmetic number, because the mean of its divisors is an integer number (19827192).

Almost surely, 2^239897645 is an apocalyptic number.

It is an amenable number.

239897645 is a deficient number, since it is larger than the sum of its proper divisors (77337427).

239897645 is a wasteful number, since it uses less digits than its factorization.

239897645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85892.

The product of its digits is 3265920, while the sum is 53.

The square root of 239897645 is about 15488.6295391168. The cubic root of 239897645 is about 621.3581439668.

The spelling of 239897645 in words is "two hundred thirty-nine million, eight hundred ninety-seven thousand, six hundred forty-five".