890610993 has 12 divisors (see below), whose sum is σ = 1310711220. Its totient is φ = 582537696.

The previous prime is 890610953. The next prime is 890611009. The reversal of 890610993 is 399016098.

It can be written as a sum of positive squares in 2 ways, for example, as 607967649 + 282643344 = 24657^2 + 16812^2 .

It is not a de Polignac number, because 890610993 - 2⁸ = 890610737 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (890610923) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 933078 + ... + 934031.

It is an arithmetic number, because the mean of its divisors is an integer number (109225935).

Almost surely, 2^890610993 is an apocalyptic number.

It is an amenable number.

890610993 is a deficient number, since it is larger than the sum of its proper divisors (420100227).

890610993 is a wasteful number, since it uses less digits than its factorization.

890610993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1867168 (or 1867165 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The square root of 890610993 is about 29843.1062893929. The cubic root of 890610993 is about 962.1202389607.

The spelling of 890610993 in words is "eight hundred ninety million, six hundred ten thousand, nine hundred ninety-three".