258138763 has 4 divisors (see below), whose sum is σ = 262370608. Its totient is φ = 253906920.

The previous prime is 258138757. The next prime is 258138787. The reversal of 258138763 is 367831852.

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 258138763 - 2¹³ = 258130571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (258138743) 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, 2115831 + ... + 2115952.

It is an arithmetic number, because the mean of its divisors is an integer number (65592652).

Almost surely, 2^258138763 is an apocalyptic number.

258138763 is a deficient number, since it is larger than the sum of its proper divisors (4231845).

258138763 is an equidigital number, since it uses as much as digits as its factorization.

258138763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4231844.

The product of its digits is 241920, while the sum is 43.

The square root of 258138763 is about 16066.6973270800. The cubic root of 258138763 is about 636.7237871993.

The spelling of 258138763 in words is "two hundred fifty-eight million, one hundred thirty-eight thousand, seven hundred sixty-three".