291040089 has 8 divisors (see below), whose sum is σ = 394415232. Its totient is φ = 190845840.

The previous prime is 291040073. The next prime is 291040093. The reversal of 291040089 is 980040192.

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

It is not a de Polignac number, because 291040089 - 2⁴ = 291040073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (291040019) 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, 795009 + ... + 795374.

It is an arithmetic number, because the mean of its divisors is an integer number (49301904).

Almost surely, 2^291040089 is an apocalyptic number.

It is an amenable number.

291040089 is a deficient number, since it is larger than the sum of its proper divisors (103375143).

291040089 is a wasteful number, since it uses less digits than its factorization.

291040089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1590447.

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 291040089 is about 17059.8970981656. The cubic root of 291040089 is about 662.7009678191.

The spelling of 291040089 in words is "two hundred ninety-one million, forty thousand, eighty-nine".