254178949 has 2 divisors, whose sum is σ = 254178950. Its totient is φ = 254178948.

The previous prime is 254178931. The next prime is 254178983. The reversal of 254178949 is 949871452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 159213924 + 94965025 = 12618^2 + 9745^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-254178949 is a prime.

It is a super-2 number, since 2×254178949² = 129213876229489202, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (254178929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127089474 + 127089475.

It is an arithmetic number, because the mean of its divisors is an integer number (127089475).

Almost surely, 2^254178949 is an apocalyptic number.

It is an amenable number.

254178949 is a deficient number, since it is larger than the sum of its proper divisors (1).

254178949 is an equidigital number, since it uses as much as digits as its factorization.

254178949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 725760, while the sum is 49.

The square root of 254178949 is about 15942.9905914794. The cubic root of 254178949 is about 633.4512437593.

The spelling of 254178949 in words is "two hundred fifty-four million, one hundred seventy-eight thousand, nine hundred forty-nine".