254136139 has 2 divisors, whose sum is σ = 254136140. Its totient is φ = 254136138.

The previous prime is 254136137. The next prime is 254136167. The reversal of 254136139 is 931631452.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 254136139 - 2¹ = 254136137 is a prime.

Together with 254136137, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (254136137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127068069 + 127068070.

It is an arithmetic number, because the mean of its divisors is an integer number (127068070).

Almost surely, 2^254136139 is an apocalyptic number.

254136139 is a deficient number, since it is larger than the sum of its proper divisors (1).

254136139 is an equidigital number, since it uses as much as digits as its factorization.

254136139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 34.

The square root of 254136139 is about 15941.6479386543. The cubic root of 254136139 is about 633.4156788283.

The spelling of 254136139 in words is "two hundred fifty-four million, one hundred thirty-six thousand, one hundred thirty-nine".