139810239 has 16 divisors (see below), whose sum is σ = 207727200. Its totient is φ = 92936448.

The previous prime is 139810219. The next prime is 139810241. The reversal of 139810239 is 932018931.

It is not a de Polignac number, because 139810239 - 2⁸ = 139809983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139810219) 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, 2197 + ... + 16865.

It is an arithmetic number, because the mean of its divisors is an integer number (12982950).

Almost surely, 2^139810239 is an apocalyptic number.

139810239 is a deficient number, since it is larger than the sum of its proper divisors (67916961).

139810239 is a wasteful number, since it uses less digits than its factorization.

139810239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15031 (or 15025 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 139810239 is about 11824.1379812653. The cubic root of 139810239 is about 519.0147010437.

The spelling of 139810239 in words is "one hundred thirty-nine million, eight hundred ten thousand, two hundred thirty-nine".