254679981 has 8 divisors (see below), whose sum is σ = 346798464. Its totient is φ = 166174080.

The previous prime is 254679979. The next prime is 254680003. The reversal of 254679981 is 189976452.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 254679981 - 2¹ = 254679979 is a prime.

It is a super-2 number, since 2×254679981² = 129723785444320722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (254679281) 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 in 7 ways as a sum of consecutive naturals, for example, 902980 + ... + 903261.

It is an arithmetic number, because the mean of its divisors is an integer number (43349808).

Almost surely, 2^254679981 is an apocalyptic number.

It is an amenable number.

254679981 is a deficient number, since it is larger than the sum of its proper divisors (92118483).

254679981 is a wasteful number, since it uses less digits than its factorization.

254679981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1806291.

The product of its digits is 1088640, while the sum is 51.

The square root of 254679981 is about 15958.6960933530. The cubic root of 254679981 is about 633.8671856718.

The spelling of 254679981 in words is "two hundred fifty-four million, six hundred seventy-nine thousand, nine hundred eighty-one".