289251081 has 40 divisors (see below), whose sum is σ = 501973824. Its totient is φ = 162557280.

The previous prime is 289251047. The next prime is 289251103. The reversal of 289251081 is 180152982.

It is not a de Polignac number, because 289251081 - 2⁷ = 289250953 is a prime.

It is a super-2 number, since 2×289251081² = 167332375719337122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (289255081) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 30406 + ... + 38768.

Almost surely, 2^289251081 is an apocalyptic number.

289251081 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

289251081 is a deficient number, since it is larger than the sum of its proper divisors (212722743).

289251081 is an equidigital number, since it uses as much as digits as its factorization.

289251081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8443 (or 8434 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The square root of 289251081 is about 17007.3831320400. The cubic root of 289251081 is about 661.3403134685.

The spelling of 289251081 in words is "two hundred eighty-nine million, two hundred fifty-one thousand, eighty-one".