239785897 has 8 divisors (see below), whose sum is σ = 258353480. Its totient is φ = 221235840.

The previous prime is 239785841. The next prime is 239785907. The reversal of 239785897 is 798587932.

It can be written as a sum of positive squares in 4 ways, for example, as 51108201 + 188677696 = 7149^2 + 13736^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 239785897 - 2⁷ = 239785769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (239785297) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43429 + ... + 48637.

It is an arithmetic number, because the mean of its divisors is an integer number (32294185).

Almost surely, 2^239785897 is an apocalyptic number.

It is an amenable number.

239785897 is a deficient number, since it is larger than the sum of its proper divisors (18567583).

239785897 is a wasteful number, since it uses less digits than its factorization.

239785897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8763.

The product of its digits is 7620480, while the sum is 58.

The square root of 239785897 is about 15485.0216984026. The cubic root of 239785897 is about 621.2616496000.

The spelling of 239785897 in words is "two hundred thirty-nine million, seven hundred eighty-five thousand, eight hundred ninety-seven".