258308247 has 4 divisors (see below), whose sum is σ = 344411000. Its totient is φ = 172205496.

The previous prime is 258308233. The next prime is 258308263. The reversal of 258308247 is 742803852.

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

It is not a de Polignac number, because 258308247 - 2⁸ = 258307991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (258308747) 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, 43051372 + ... + 43051377.

It is an arithmetic number, because the mean of its divisors is an integer number (86102750).

Almost surely, 2^258308247 is an apocalyptic number.

258308247 is a deficient number, since it is larger than the sum of its proper divisors (86102753).

258308247 is an equidigital number, since it uses as much as digits as its factorization.

258308247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86102752.

The product of its (nonzero) digits is 107520, while the sum is 39.

The square root of 258308247 is about 16071.9708498989. The cubic root of 258308247 is about 636.8631061767.

It can be divided in two parts, 258 and 308247, that added together give a triangular number (308505 = T₇₈₅).

The spelling of 258308247 in words is "two hundred fifty-eight million, three hundred eight thousand, two hundred forty-seven".