249492547 has 2 divisors, whose sum is σ = 249492548. Its totient is φ = 249492546.

The previous prime is 249492511. The next prime is 249492559. The reversal of 249492547 is 745294942.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 249492547 - 2¹⁵ = 249459779 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 249492497 and 249492506.

It is not a weakly prime, because it can be changed into another prime (249492847) 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, 124746273 + 124746274.

It is an arithmetic number, because the mean of its divisors is an integer number (124746274).

Almost surely, 2^249492547 is an apocalyptic number.

249492547 is a deficient number, since it is larger than the sum of its proper divisors (1).

249492547 is an equidigital number, since it uses as much as digits as its factorization.

249492547 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 725760, while the sum is 46.

The square root of 249492547 is about 15795.3330765768. Note that the first 3 decimals coincide. The cubic root of 249492547 is about 629.5340024193.

The spelling of 249492547 in words is "two hundred forty-nine million, four hundred ninety-two thousand, five hundred forty-seven".