249479475 has 48 divisors (see below), whose sum is σ = 486635520. Its totient is φ = 110361600.

The previous prime is 249479429. The next prime is 249479497. The reversal of 249479475 is 574974942.

It is not a de Polignac number, because 249479475 - 2⁶ = 249479411 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8611 + ... + 23939.

It is an arithmetic number, because the mean of its divisors is an integer number (10138240).

Almost surely, 2^249479475 is an apocalyptic number.

249479475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

249479475 is a deficient number, since it is larger than the sum of its proper divisors (237156045).

249479475 is a wasteful number, since it uses less digits than its factorization.

249479475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15380 (or 15375 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 51.

The square root of 249479475 is about 15794.9192780463. The cubic root of 249479475 is about 629.5230075521.

The spelling of 249479475 in words is "two hundred forty-nine million, four hundred seventy-nine thousand, four hundred seventy-five".