254789981 has 8 divisors (see below), whose sum is σ = 268363200. Its totient is φ = 241233120.

The previous prime is 254789971. The next prime is 254790017. The reversal of 254789981 is 189987452.

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

It is not a de Polignac number, because 254789981 - 2¹⁸ = 254527837 is a prime.

It is a super-2 number, since 2×254789981² = 129835868835960722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (254789971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40400 + ... + 46278.

It is an arithmetic number, because the mean of its divisors is an integer number (33545400).

Almost surely, 2^254789981 is an apocalyptic number.

It is an amenable number.

254789981 is a deficient number, since it is larger than the sum of its proper divisors (13573219).

254789981 is a wasteful number, since it uses less digits than its factorization.

254789981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8179.

The product of its digits is 1451520, while the sum is 53.

The square root of 254789981 is about 15962.1421181494. The cubic root of 254789981 is about 633.9584313652.

The spelling of 254789981 in words is "two hundred fifty-four million, seven hundred eighty-nine thousand, nine hundred eighty-one".