254811989 has 2 divisors, whose sum is σ = 254811990. Its totient is φ = 254811988.

The previous prime is 254811959. The next prime is 254812027. The reversal of 254811989 is 989118452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 205348900 + 49463089 = 14330^2 + 7033^2 .

It is a cyclic number.

It is not a de Polignac number, because 254811989 - 2¹² = 254807893 is a prime.

It is a super-2 number, since 2×254811989² = 129858299476272242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (254811959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127405994 + 127405995.

It is an arithmetic number, because the mean of its divisors is an integer number (127405995).

Almost surely, 2^254811989 is an apocalyptic number.

It is an amenable number.

254811989 is a deficient number, since it is larger than the sum of its proper divisors (1).

254811989 is an equidigital number, since it uses as much as digits as its factorization.

254811989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 207360, while the sum is 47.

The square root of 254811989 is about 15962.8314844203. The cubic root of 254811989 is about 633.9766839870.

The spelling of 254811989 in words is "two hundred fifty-four million, eight hundred eleven thousand, nine hundred eighty-nine".