249986475 has 36 divisors (see below), whose sum is σ = 450502416. Its totient is φ = 132507840.

The previous prime is 249986441. The next prime is 249986483. The reversal of 249986475 is 574689942.

249986475 is a `hidden beast` number, since 2 + 4 + 99 + 86 + 475 = 666.

It is not a de Polignac number, because 249986475 - 2⁹ = 249985963 is a prime.

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 34249 + ... + 40901.

It is an arithmetic number, because the mean of its divisors is an integer number (12513956).

Almost surely, 2^249986475 is an apocalyptic number.

249986475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

249986475 is a deficient number, since it is larger than the sum of its proper divisors (200515941).

249986475 is a wasteful number, since it uses less digits than its factorization.

249986475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6836 (or 6828 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 54.

The square root of 249986475 is about 15810.9605970036. The cubic root of 249986475 is about 629.9491644544.

The spelling of 249986475 in words is "two hundred forty-nine million, nine hundred eighty-six thousand, four hundred seventy-five".