249494895 has 24 divisors (see below), whose sum is σ = 465724896. Its totient is φ = 122827968.

The previous prime is 249494887. The next prime is 249494897. The reversal of 249494895 is 598494942.

It is not a de Polignac number, because 249494895 - 2³ = 249494887 is a prime.

It is a super-2 number, since 2×249494895² = 124495405262122050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249494897) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 212659 + ... + 213828.

It is an arithmetic number, because the mean of its divisors is an integer number (19405204).

Almost surely, 2^249494895 is an apocalyptic number.

249494895 is a deficient number, since it is larger than the sum of its proper divisors (216230001).

249494895 is a wasteful number, since it uses less digits than its factorization.

249494895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426511 (or 426508 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 54.

The square root of 249494895 is about 15795.4074021533. The cubic root of 249494895 is about 629.5359772828.

The spelling of 249494895 in words is "two hundred forty-nine million, four hundred ninety-four thousand, eight hundred ninety-five".