249045487 has 2 divisors, whose sum is σ = 249045488. Its totient is φ = 249045486.

The previous prime is 249045481. The next prime is 249045491. The reversal of 249045487 is 784540942.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 249045487 - 2³ = 249045479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249045481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124522743 + 124522744.

It is an arithmetic number, because the mean of its divisors is an integer number (124522744).

Almost surely, 2^249045487 is an apocalyptic number.

249045487 is a deficient number, since it is larger than the sum of its proper divisors (1).

249045487 is an equidigital number, since it uses as much as digits as its factorization.

249045487 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 322560, while the sum is 43.

The square root of 249045487 is about 15781.1750829905. The cubic root of 249045487 is about 629.1577617343.

The spelling of 249045487 in words is "two hundred forty-nine million, forty-five thousand, four hundred eighty-seven".