249752543 has 2 divisors, whose sum is σ = 249752544. Its totient is φ = 249752542.

The previous prime is 249752537. The next prime is 249752563. The reversal of 249752543 is 345257942.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 249752543 - 2⁴ = 249752527 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 249752543.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249752563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124876271 + 124876272.

It is an arithmetic number, because the mean of its divisors is an integer number (124876272).

Almost surely, 2^249752543 is an apocalyptic number.

249752543 is a deficient number, since it is larger than the sum of its proper divisors (1).

249752543 is an equidigital number, since it uses as much as digits as its factorization.

249752543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 302400, while the sum is 41.

The square root of 249752543 is about 15803.5610860337. The cubic root of 249752543 is about 629.7526054753.

The spelling of 249752543 in words is "two hundred forty-nine million, seven hundred fifty-two thousand, five hundred forty-three".