249397930 has 16 divisors (see below), whose sum is σ = 455067144. Its totient is φ = 98392320.

The previous prime is 249397927. The next prime is 249397969. The reversal of 249397930 is 39793942.

It can be written as a sum of positive squares in 4 ways, for example, as 241895809 + 7502121 = 15553^2 + 2739^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170091 + ... + 171550.

Almost surely, 2^249397930 is an apocalyptic number.

249397930 is a deficient number, since it is larger than the sum of its proper divisors (205669214).

249397930 is a wasteful number, since it uses less digits than its factorization.

249397930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341721.

The product of its (nonzero) digits is 367416, while the sum is 46.

The square root of 249397930 is about 15792.3376990235. The cubic root of 249397930 is about 629.4544113310.

The spelling of 249397930 in words is "two hundred forty-nine million, three hundred ninety-seven thousand, nine hundred thirty".