249689489 has 16 divisors (see below), whose sum is σ = 302859648. Its totient is φ = 200954112.

The previous prime is 249689483. The next prime is 249689497. The reversal of 249689489 is 984986942.

It is a cyclic number.

It is not a de Polignac number, because 249689489 - 2²⁰ = 248640913 is a prime.

It is a super-2 number, since 2×249689489² = 124689681834162242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (249689483) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53327 + ... + 57819.

It is an arithmetic number, because the mean of its divisors is an integer number (18928728).

Almost surely, 2^249689489 is an apocalyptic number.

It is an amenable number.

249689489 is a deficient number, since it is larger than the sum of its proper divisors (53170159).

249689489 is a wasteful number, since it uses less digits than its factorization.

249689489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4984.

The product of its digits is 8957952, while the sum is 59.

The square root of 249689489 is about 15801.5660299858. The cubic root of 249689489 is about 629.6996039958.

The spelling of 249689489 in words is "two hundred forty-nine million, six hundred eighty-nine thousand, four hundred eighty-nine".