254491813 has 2 divisors, whose sum is σ = 254491814. Its totient is φ = 254491812.

The previous prime is 254491807. The next prime is 254491829. The reversal of 254491813 is 318194452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 254019844 + 471969 = 15938^2 + 687^2 .

It is a cyclic number.

It is not a de Polignac number, because 254491813 - 2⁵ = 254491781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (254491873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127245906 + 127245907.

It is an arithmetic number, because the mean of its divisors is an integer number (127245907).

Almost surely, 2^254491813 is an apocalyptic number.

It is an amenable number.

254491813 is a deficient number, since it is larger than the sum of its proper divisors (1).

254491813 is an equidigital number, since it uses as much as digits as its factorization.

254491813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 37.

The square root of 254491813 is about 15952.7995348779. The cubic root of 254491813 is about 633.7110381975.

The spelling of 254491813 in words is "two hundred fifty-four million, four hundred ninety-one thousand, eight hundred thirteen".