289191081 has 8 divisors (see below), whose sum is σ = 394992864. Its totient is φ = 188091680.

The previous prime is 289191053. The next prime is 289191107. The reversal of 289191081 is 180191982.

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

It is a cyclic number.

It is not a de Polignac number, because 289191081 - 2¹⁵ = 289158313 is a prime.

It is a super-2 number, since 2×289191081² = 167262962659897122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (289191011) 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, 1175451 + ... + 1175696.

It is an arithmetic number, because the mean of its divisors is an integer number (49374108).

Almost surely, 2^289191081 is an apocalyptic number.

It is an amenable number.

289191081 is a deficient number, since it is larger than the sum of its proper divisors (105801783).

289191081 is a wasteful number, since it uses less digits than its factorization.

289191081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2351191.

The product of its (nonzero) digits is 10368, while the sum is 39.

The square root of 289191081 is about 17005.6191007561. The cubic root of 289191081 is about 661.2945825385.

The spelling of 289191081 in words is "two hundred eighty-nine million, one hundred ninety-one thousand, eighty-one".