254487491 has 2 divisors, whose sum is σ = 254487492. Its totient is φ = 254487490.

The previous prime is 254487461. The next prime is 254487511. The reversal of 254487491 is 194784452.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-254487491 is a prime.

It is a super-3 number, since 3×254487491³ (a number of 26 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (254487461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127243745 + 127243746.

It is an arithmetic number, because the mean of its divisors is an integer number (127243746).

Almost surely, 2^254487491 is an apocalyptic number.

254487491 is a deficient number, since it is larger than the sum of its proper divisors (1).

254487491 is an equidigital number, since it uses as much as digits as its factorization.

254487491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 322560, while the sum is 44.

The square root of 254487491 is about 15952.6640721856. The cubic root of 254487491 is about 633.7074507676.

The spelling of 254487491 in words is "two hundred fifty-four million, four hundred eighty-seven thousand, four hundred ninety-one".