890333993 has 2 divisors, whose sum is σ = 890333994. Its totient is φ = 890333992.

The previous prime is 890333971. The next prime is 890333999. The reversal of 890333993 is 399333098.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 582401689 + 307932304 = 24133^2 + 17548^2 .

It is a cyclic number.

It is not a de Polignac number, because 890333993 - 2¹⁰ = 890332969 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (890333999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 445166996 + 445166997.

It is an arithmetic number, because the mean of its divisors is an integer number (445166997).

Almost surely, 2^890333993 is an apocalyptic number.

It is an amenable number.

890333993 is a deficient number, since it is larger than the sum of its proper divisors (1).

890333993 is an equidigital number, since it uses as much as digits as its factorization.

890333993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 472392, while the sum is 47.

The square root of 890333993 is about 29838.4649906794. The cubic root of 890333993 is about 962.0204816244.

The spelling of 890333993 in words is "eight hundred ninety million, three hundred thirty-three thousand, nine hundred ninety-three".