249640149 has 16 divisors (see below), whose sum is σ = 375635520. Its totient is φ = 146079360.

The previous prime is 249640141. The next prime is 249640163. The reversal of 249640149 is 941046942.

It is not a de Polignac number, because 249640149 - 2³ = 249640141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249640141) 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, 129472 + ... + 131385.

It is an arithmetic number, because the mean of its divisors is an integer number (23477220).

Almost surely, 2^249640149 is an apocalyptic number.

249640149 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

249640149 is a deficient number, since it is larger than the sum of its proper divisors (125995371).

249640149 is a wasteful number, since it uses less digits than its factorization.

249640149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260900.

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 249640149 is about 15800.0047151892. The cubic root of 249640149 is about 629.6581239088.

The spelling of 249640149 in words is "two hundred forty-nine million, six hundred forty thousand, one hundred forty-nine".