254977643 has 2 divisors, whose sum is σ = 254977644. Its totient is φ = 254977642.

The previous prime is 254977627. The next prime is 254977649. The reversal of 254977643 is 346779452.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 254977643 - 2⁴ = 254977627 is a prime.

It is not a weakly prime, because it can be changed into another prime (254977649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127488821 + 127488822.

It is an arithmetic number, because the mean of its divisors is an integer number (127488822).

Almost surely, 2^254977643 is an apocalyptic number.

254977643 is a deficient number, since it is larger than the sum of its proper divisors (1).

254977643 is an equidigital number, since it uses as much as digits as its factorization.

254977643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1270080, while the sum is 47.

The square root of 254977643 is about 15968.0193825033. The cubic root of 254977643 is about 634.1140375761.

The spelling of 254977643 in words is "two hundred fifty-four million, nine hundred seventy-seven thousand, six hundred forty-three".