249133491 has 12 divisors (see below), whose sum is σ = 378799720. Its totient is φ = 157347360.

The previous prime is 249133483. The next prime is 249133553. The reversal of 249133491 is 194331942.

It is not a de Polignac number, because 249133491 - 2³ = 249133483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (249133411) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 728290 + ... + 728631.

Almost surely, 2^249133491 is an apocalyptic number.

249133491 is a deficient number, since it is larger than the sum of its proper divisors (129666229).

249133491 is a wasteful number, since it uses less digits than its factorization.

249133491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1456946 (or 1456943 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 249133491 is about 15783.9630954966. The cubic root of 249133491 is about 629.2318604861.

The spelling of 249133491 in words is "two hundred forty-nine million, one hundred thirty-three thousand, four hundred ninety-one".