249488879 has 2 divisors, whose sum is σ = 249488880. Its totient is φ = 249488878.

The previous prime is 249488809. The next prime is 249488893. The reversal of 249488879 is 978884942.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 249488879 - 2¹² = 249484783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249488809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124744439 + 124744440.

It is an arithmetic number, because the mean of its divisors is an integer number (124744440).

Almost surely, 2^249488879 is an apocalyptic number.

249488879 is a deficient number, since it is larger than the sum of its proper divisors (1).

249488879 is an equidigital number, since it uses as much as digits as its factorization.

249488879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9289728, while the sum is 59.

The square root of 249488879 is about 15795.2169659046. The cubic root of 249488879 is about 629.5309173010.

The spelling of 249488879 in words is "two hundred forty-nine million, four hundred eighty-eight thousand, eight hundred seventy-nine".