890009291 has 2 divisors, whose sum is σ = 890009292. Its totient is φ = 890009290.

The previous prime is 890009261. The next prime is 890009297. The reversal of 890009291 is 192900098.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-890009291 is a prime.

It is not a weakly prime, because it can be changed into another prime (890009297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 445004645 + 445004646.

It is an arithmetic number, because the mean of its divisors is an integer number (445004646).

Almost surely, 2^890009291 is an apocalyptic number.

890009291 is a deficient number, since it is larger than the sum of its proper divisors (1).

890009291 is an equidigital number, since it uses as much as digits as its factorization.

890009291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 38.

The square root of 890009291 is about 29833.0234974600. The cubic root of 890009291 is about 961.9035187925.

The spelling of 890009291 in words is "eight hundred ninety million, nine thousand, two hundred ninety-one".