258795139 has 4 divisors (see below), whose sum is σ = 260833024. Its totient is φ = 256757256.

The previous prime is 258795137. The next prime is 258795191. The reversal of 258795139 is 931597852.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 258795139 - 2¹ = 258795137 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 258795092 and 258795101.

It is not an unprimeable number, because it can be changed into a prime (258795133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1018752 + ... + 1019005.

It is an arithmetic number, because the mean of its divisors is an integer number (65208256).

Almost surely, 2^258795139 is an apocalyptic number.

258795139 is a deficient number, since it is larger than the sum of its proper divisors (2037885).

258795139 is a wasteful number, since it uses less digits than its factorization.

258795139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2037884.

The product of its digits is 680400, while the sum is 49.

The square root of 258795139 is about 16087.1109587769. The cubic root of 258795139 is about 637.2630016899.

The spelling of 258795139 in words is "two hundred fifty-eight million, seven hundred ninety-five thousand, one hundred thirty-nine".