254531987 has 2 divisors, whose sum is σ = 254531988. Its totient is φ = 254531986.

The previous prime is 254531957. The next prime is 254531989. The reversal of 254531987 is 789135452.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 254531987 - 2¹⁴ = 254515603 is a prime.

Together with 254531989, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (254531989) 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, 127265993 + 127265994.

It is an arithmetic number, because the mean of its divisors is an integer number (127265994).

Almost surely, 2^254531987 is an apocalyptic number.

254531987 is a deficient number, since it is larger than the sum of its proper divisors (1).

254531987 is an equidigital number, since it uses as much as digits as its factorization.

254531987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 302400, while the sum is 44.

The square root of 254531987 is about 15954.0586372246. The cubic root of 254531987 is about 633.7443822534.

The spelling of 254531987 in words is "two hundred fifty-four million, five hundred thirty-one thousand, nine hundred eighty-seven".