239067981 has 12 divisors (see below), whose sum is σ = 345480252. Its totient is φ = 159304896.

The previous prime is 239067977. The next prime is 239068061. The reversal of 239067981 is 189760932.

It can be written as a sum of positive squares in 2 ways, for example, as 82192356 + 156875625 = 9066^2 + 12525^2 .

It is not a de Polignac number, because 239067981 - 2² = 239067977 is a prime.

It is a super-2 number, since 2×239067981² = 114306999078832722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (239067901) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20425 + ... + 29921.

It is an arithmetic number, because the mean of its divisors is an integer number (28790021).

Almost surely, 2^239067981 is an apocalyptic number.

It is an amenable number.

239067981 is a deficient number, since it is larger than the sum of its proper divisors (106412271).

239067981 is a wasteful number, since it uses less digits than its factorization.

239067981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12300 (or 12297 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 239067981 is about 15461.8233400851. The cubic root of 239067981 is about 620.6410132383.

The spelling of 239067981 in words is "two hundred thirty-nine million, sixty-seven thousand, nine hundred eighty-one".