994942621 has 2 divisors, whose sum is σ = 994942622. Its totient is φ = 994942620.

The previous prime is 994942607. The next prime is 994942633. The reversal of 994942621 is 126249499.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 946792900 + 48149721 = 30770^2 + 6939^2 .

It is a cyclic number.

It is not a de Polignac number, because 994942621 - 2¹⁷ = 994811549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (994942651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 497471310 + 497471311.

It is an arithmetic number, because the mean of its divisors is an integer number (497471311).

Almost surely, 2^994942621 is an apocalyptic number.

It is an amenable number.

994942621 is a deficient number, since it is larger than the sum of its proper divisors (1).

994942621 is an equidigital number, since it uses as much as digits as its factorization.

994942621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 279936, while the sum is 46.

The square root of 994942621 is about 31542.7110597678. The cubic root of 994942621 is about 998.3113570902.

The spelling of 994942621 in words is "nine hundred ninety-four million, nine hundred forty-two thousand, six hundred twenty-one".