258948691 has 4 divisors (see below), whose sum is σ = 258983712. Its totient is φ = 258913672.

The previous prime is 258948689. The next prime is 258948713. The reversal of 258948691 is 196849852.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 258948691 - 2¹ = 258948689 is a prime.

It is a super-2 number, since 2×258948691² = 134108849141226962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (258948601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1600 + ... + 22813.

It is an arithmetic number, because the mean of its divisors is an integer number (64745928).

Almost surely, 2^258948691 is an apocalyptic number.

258948691 is a deficient number, since it is larger than the sum of its proper divisors (35021).

258948691 is a wasteful number, since it uses less digits than its factorization.

258948691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35020.

The product of its digits is 1244160, while the sum is 52.

The square root of 258948691 is about 16091.8827674079. The cubic root of 258948691 is about 637.3890134097.

The spelling of 258948691 in words is "two hundred fifty-eight million, nine hundred forty-eight thousand, six hundred ninety-one".