249683649 has 12 divisors (see below), whose sum is σ = 344790576. Its totient is φ = 160714288.

The previous prime is 249683633. The next prime is 249683663. The reversal of 249683649 is 946386942.

It is not a de Polignac number, because 249683649 - 2⁴ = 249683633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (249683669) 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, 46959 + ... + 52004.

It is an arithmetic number, because the mean of its divisors is an integer number (28732548).

Almost surely, 2^249683649 is an apocalyptic number.

249683649 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

249683649 is a deficient number, since it is larger than the sum of its proper divisors (95106927).

249683649 is an equidigital number, since it uses as much as digits as its factorization.

249683649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99024 (or 98995 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 51.

The square root of 249683649 is about 15801.3812370944. The cubic root of 249683649 is about 629.6946945989.

The spelling of 249683649 in words is "two hundred forty-nine million, six hundred eighty-three thousand, six hundred forty-nine".