235920139 has 16 divisors (see below), whose sum is σ = 290884608. Its totient is φ = 186327072.

The previous prime is 235920107. The next prime is 235920187. The reversal of 235920139 is 931029532.

It is a cyclic number.

It is not a de Polignac number, because 235920139 - 2⁵ = 235920107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (235923139) 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, 56874 + ... + 60880.

It is an arithmetic number, because the mean of its divisors is an integer number (18180288).

Almost surely, 2^235920139 is an apocalyptic number.

235920139 is a deficient number, since it is larger than the sum of its proper divisors (54964469).

235920139 is a wasteful number, since it uses less digits than its factorization.

235920139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4674.

The product of its (nonzero) digits is 14580, while the sum is 34.

The square root of 235920139 is about 15359.6920216520. The cubic root of 235920139 is about 617.9049464026.

The spelling of 235920139 in words is "two hundred thirty-five million, nine hundred twenty thousand, one hundred thirty-nine".