258449399 has 4 divisors (see below), whose sum is σ = 278330136. Its totient is φ = 238568664.

The previous prime is 258449383. The next prime is 258449407. The reversal of 258449399 is 993944852.

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 258449399 - 2⁴ = 258449383 is a prime.

It is a super-2 number, since 2×258449399² = 133592183686922402, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 258449399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (258449309) 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, 9940349 + ... + 9940374.

It is an arithmetic number, because the mean of its divisors is an integer number (69582534).

Almost surely, 2^258449399 is an apocalyptic number.

258449399 is a deficient number, since it is larger than the sum of its proper divisors (19880737).

258449399 is a wasteful number, since it uses less digits than its factorization.

258449399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19880736.

The product of its digits is 2799360, while the sum is 53.

The square root of 258449399 is about 16076.3614975529. The cubic root of 258449399 is about 636.9790892227.

The spelling of 258449399 in words is "two hundred fifty-eight million, four hundred forty-nine thousand, three hundred ninety-nine".