249473579 has 2 divisors, whose sum is σ = 249473580. Its totient is φ = 249473578.

The previous prime is 249473569. The next prime is 249473633. The reversal of 249473579 is 975374942.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 249473579 - 2⁴ = 249473563 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (249473569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124736789 + 124736790.

It is an arithmetic number, because the mean of its divisors is an integer number (124736790).

Almost surely, 2^249473579 is an apocalyptic number.

249473579 is a deficient number, since it is larger than the sum of its proper divisors (1).

249473579 is an equidigital number, since it uses as much as digits as its factorization.

249473579 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1905120, while the sum is 50.

The square root of 249473579 is about 15794.7326346475. The cubic root of 249473579 is about 629.5180482973.

It can be divided in two parts, 249473 and 579, that added together give a palindrome (250052).

The spelling of 249473579 in words is "two hundred forty-nine million, four hundred seventy-three thousand, five hundred seventy-nine".