254399989 has 2 divisors, whose sum is σ = 254399990. Its totient is φ = 254399988.

The previous prime is 254399969. The next prime is 254400001. The reversal of 254399989 is 989993452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 225991089 + 28408900 = 15033^2 + 5330^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-254399989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (254399939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127199994 + 127199995.

It is an arithmetic number, because the mean of its divisors is an integer number (127199995).

Almost surely, 2^254399989 is an apocalyptic number.

It is an amenable number.

254399989 is a deficient number, since it is larger than the sum of its proper divisors (1).

254399989 is an equidigital number, since it uses as much as digits as its factorization.

254399989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6298560, while the sum is 58.

The square root of 254399989 is about 15949.9212850722. The cubic root of 254399989 is about 633.6348119310.

The spelling of 254399989 in words is "two hundred fifty-four million, three hundred ninety-nine thousand, nine hundred eighty-nine".