258591961 has 4 divisors (see below), whose sum is σ = 264899124. Its totient is φ = 252284800.

The previous prime is 258591953. The next prime is 258591973. The reversal of 258591961 is 169195852.

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

It can be written as a sum of positive squares in 2 ways, for example, as 133263936 + 125328025 = 11544^2 + 11195^2 .

It is a cyclic number.

It is not a de Polignac number, because 258591961 - 2³ = 258591953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (258591901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3153520 + ... + 3153601.

It is an arithmetic number, because the mean of its divisors is an integer number (66224781).

Almost surely, 2^258591961 is an apocalyptic number.

It is an amenable number.

258591961 is a deficient number, since it is larger than the sum of its proper divisors (6307163).

258591961 is an equidigital number, since it uses as much as digits as its factorization.

258591961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6307162.

The product of its digits is 194400, while the sum is 46.

The square root of 258591961 is about 16080.7947875719. The cubic root of 258591961 is about 637.0961879939.

The spelling of 258591961 in words is "two hundred fifty-eight million, five hundred ninety-one thousand, nine hundred sixty-one".