900994121 has 2 divisors, whose sum is σ = 900994122. Its totient is φ = 900994120.

The previous prime is 900994049. The next prime is 900994123. The reversal of 900994121 is 121499009.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 834343225 + 66650896 = 28885^2 + 8164^2 .

It is a cyclic number.

It is not a de Polignac number, because 900994121 - 2¹⁰ = 900993097 is a prime.

Together with 900994123, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (900994123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 450497060 + 450497061.

It is an arithmetic number, because the mean of its divisors is an integer number (450497061).

Almost surely, 2^900994121 is an apocalyptic number.

It is an amenable number.

900994121 is a deficient number, since it is larger than the sum of its proper divisors (1).

900994121 is an equidigital number, since it uses as much as digits as its factorization.

900994121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 35.

The square root of 900994121 is about 30016.5641105041. The cubic root of 900994121 is about 965.8447401955.

The spelling of 900994121 in words is "nine hundred million, nine hundred ninety-four thousand, one hundred twenty-one".