249498913 has 6 divisors (see below), whose sum is σ = 252548114. Its totient is φ = 246486096.

The previous prime is 249498911. The next prime is 249498923. The reversal of 249498913 is 319894942.

It is the 6449-th star number.

It can be written as a sum of positive squares in only one way, i.e., 167650704 + 81848209 = 12948^2 + 9047^2 .

It is not a de Polignac number, because 249498913 - 2¹ = 249498911 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (249498911) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11220 + ... + 24997.

Almost surely, 2^249498913 is an apocalyptic number.

It is an amenable number.

249498913 is a deficient number, since it is larger than the sum of its proper divisors (3049201).

249498913 is an frugal number, since it uses more digits than its factorization.

249498913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36383 (or 36300 counting only the distinct ones).

The product of its digits is 559872, while the sum is 49.

The square root of 249498913 is about 15795.5345905101. The cubic root of 249498913 is about 629.5393567267.

The spelling of 249498913 in words is "two hundred forty-nine million, four hundred ninety-eight thousand, nine hundred thirteen".