249688449 has 12 divisors (see below), whose sum is σ = 361670400. Its totient is φ = 165993144.

The previous prime is 249688409. The next prime is 249688471. The reversal of 249688449 is 944886942.

249688449 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 249688449 - 2⁹ = 249687937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 249688395 and 249688404.

It is not an unprimeable number, because it can be changed into a prime (249688409) 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, 35409 + ... + 41870.

It is an arithmetic number, because the mean of its divisors is an integer number (30139200).

Almost surely, 2^249688449 is an apocalyptic number.

It is an amenable number.

249688449 is a deficient number, since it is larger than the sum of its proper divisors (111981951).

249688449 is a wasteful number, since it uses less digits than its factorization.

249688449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77644 (or 77641 counting only the distinct ones).

The product of its digits is 3981312, while the sum is 54.

The square root of 249688449 is about 15801.5331218208. The cubic root of 249688449 is about 629.6987297252.

The spelling of 249688449 in words is "two hundred forty-nine million, six hundred eighty-eight thousand, four hundred forty-nine".