249130509 has 32 divisors (see below), whose sum is σ = 351120000. Its totient is φ = 156950784.

The previous prime is 249130507. The next prime is 249130513. The reversal of 249130509 is 905031942.

It is not a de Polignac number, because 249130509 - 2¹ = 249130507 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 249130509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249130501) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 713667 + ... + 714015.

It is an arithmetic number, because the mean of its divisors is an integer number (10972500).

Almost surely, 2^249130509 is an apocalyptic number.

It is an amenable number.

249130509 is a deficient number, since it is larger than the sum of its proper divisors (101989491).

249130509 is a wasteful number, since it uses less digits than its factorization.

249130509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557.

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 249130509 is about 15783.8686322460. The cubic root of 249130509 is about 629.2293499486.

The spelling of 249130509 in words is "two hundred forty-nine million, one hundred thirty thousand, five hundred nine".