258403947 has 8 divisors (see below), whose sum is σ = 345765840. Its totient is φ = 171655680.

The previous prime is 258403939. The next prime is 258403963. The reversal of 258403947 is 749304852.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 258403947 - 2³ = 258403939 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 258403899 and 258403908.

It is not an unprimeable number, because it can be changed into a prime (258403907) 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 7 ways as a sum of consecutive naturals, for example, 152422 + ... + 154107.

It is an arithmetic number, because the mean of its divisors is an integer number (43220730).

Almost surely, 2^258403947 is an apocalyptic number.

258403947 is a deficient number, since it is larger than the sum of its proper divisors (87361893).

258403947 is a wasteful number, since it uses less digits than its factorization.

258403947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306813.

The product of its (nonzero) digits is 241920, while the sum is 42.

The square root of 258403947 is about 16074.9478070692. The cubic root of 258403947 is about 636.9417464249.

The spelling of 258403947 in words is "two hundred fifty-eight million, four hundred three thousand, nine hundred forty-seven".