249479575 has 6 divisors (see below), whose sum is σ = 309354704. Its totient is φ = 199583640.

The previous prime is 249479561. The next prime is 249479579. The reversal of 249479575 is 575974942.

It is not a de Polignac number, because 249479575 - 2¹⁵ = 249446807 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 (249479579) 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 5 ways as a sum of consecutive naturals, for example, 4989567 + ... + 4989616.

Almost surely, 2^249479575 is an apocalyptic number.

249479575 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

249479575 is a deficient number, since it is larger than the sum of its proper divisors (59875129).

249479575 is an equidigital number, since it uses as much as digits as its factorization.

249479575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9979193 (or 9979188 counting only the distinct ones).

The product of its digits is 3175200, while the sum is 52.

The square root of 249479575 is about 15794.9224436209. The cubic root of 249479575 is about 629.5230916637.

The spelling of 249479575 in words is "two hundred forty-nine million, four hundred seventy-nine thousand, five hundred seventy-five".