249538149 has 24 divisors (see below), whose sum is σ = 413774400. Its totient is φ = 141956928.

The previous prime is 249538147. The next prime is 249538213. The reversal of 249538149 is 941835942.

It is not a de Polignac number, because 249538149 - 2¹ = 249538147 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249538147) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5577 + ... + 23025.

It is an arithmetic number, because the mean of its divisors is an integer number (17240600).

Almost surely, 2^249538149 is an apocalyptic number.

It is an amenable number.

249538149 is a deficient number, since it is larger than the sum of its proper divisors (164236251).

249538149 is a wasteful number, since it uses less digits than its factorization.

249538149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17689 (or 17686 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 249538149 is about 15796.7765382688. The cubic root of 249538149 is about 629.5723552826.

The spelling of 249538149 in words is "two hundred forty-nine million, five hundred thirty-eight thousand, one hundred forty-nine".