249901489 has 2 divisors, whose sum is σ = 249901490. Its totient is φ = 249901488.

The previous prime is 249901321. The next prime is 249901493. The reversal of 249901489 is 984109942.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 223203600 + 26697889 = 14940^2 + 5167^2 .

It is a cyclic number.

It is not a de Polignac number, because 249901489 - 2¹³ = 249893297 is a prime.

It is not a weakly prime, because it can be changed into another prime (249902489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124950744 + 124950745.

It is an arithmetic number, because the mean of its divisors is an integer number (124950745).

Almost surely, 2^249901489 is an apocalyptic number.

It is an amenable number.

249901489 is a deficient number, since it is larger than the sum of its proper divisors (1).

249901489 is an equidigital number, since it uses as much as digits as its factorization.

249901489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 186624, while the sum is 46.

The square root of 249901489 is about 15808.2728025550. The cubic root of 249901489 is about 629.8777700218.

The spelling of 249901489 in words is "two hundred forty-nine million, nine hundred one thousand, four hundred eighty-nine".