249492559 has 2 divisors, whose sum is σ = 249492560. Its totient is φ = 249492558.

The previous prime is 249492547. The next prime is 249492563. The reversal of 249492559 is 955294942.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 249492559 - 2¹⁹ = 248968271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249492589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124746279 + 124746280.

It is an arithmetic number, because the mean of its divisors is an integer number (124746280).

Almost surely, 2^249492559 is an apocalyptic number.

249492559 is a deficient number, since it is larger than the sum of its proper divisors (1).

249492559 is an equidigital number, since it uses as much as digits as its factorization.

249492559 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1166400, while the sum is 49.

The square root of 249492559 is about 15795.3334564358. Note that the first 3 decimals coincide. The cubic root of 249492559 is about 629.5340125123.

The spelling of 249492559 in words is "two hundred forty-nine million, four hundred ninety-two thousand, five hundred fifty-nine".