900890623 has 2 divisors, whose sum is σ = 900890624. Its totient is φ = 900890622.

The previous prime is 900890593. The next prime is 900890677. The reversal of 900890623 is 326098009.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 900890623 - 2¹⁷ = 900759551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (900890693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 450445311 + 450445312.

It is an arithmetic number, because the mean of its divisors is an integer number (450445312).

Almost surely, 2^900890623 is an apocalyptic number.

900890623 is a deficient number, since it is larger than the sum of its proper divisors (1).

900890623 is an equidigital number, since it uses as much as digits as its factorization.

900890623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 900890623 is about 30014.8400462171. The cubic root of 900890623 is about 965.8077562965.

The spelling of 900890623 in words is "nine hundred million, eight hundred ninety thousand, six hundred twenty-three".