249238487 has 2 divisors, whose sum is σ = 249238488. Its totient is φ = 249238486.

The previous prime is 249238477. The next prime is 249238529. The reversal of 249238487 is 784832942.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 249238487 - 2¹⁶ = 249172951 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249238477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124619243 + 124619244.

It is an arithmetic number, because the mean of its divisors is an integer number (124619244).

Almost surely, 2^249238487 is an apocalyptic number.

249238487 is a deficient number, since it is larger than the sum of its proper divisors (1).

249238487 is an equidigital number, since it uses as much as digits as its factorization.

249238487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 774144, while the sum is 47.

The square root of 249238487 is about 15787.2887792680. The cubic root of 249238487 is about 629.3202435576.

The spelling of 249238487 in words is "two hundred forty-nine million, two hundred thirty-eight thousand, four hundred eighty-seven".