990444629 has 2 divisors, whose sum is σ = 990444630. Its totient is φ = 990444628.

The previous prime is 990444619. The next prime is 990444643. The reversal of 990444629 is 926444099.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 791578225 + 198866404 = 28135^2 + 14102^2 .

It is a cyclic number.

It is not a de Polignac number, because 990444629 - 2¹² = 990440533 is a prime.

It is a super-2 number, since 2×990444629² = 1961961126229895282, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (990444619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495222314 + 495222315.

It is an arithmetic number, because the mean of its divisors is an integer number (495222315).

Almost surely, 2^990444629 is an apocalyptic number.

It is an amenable number.

990444629 is a deficient number, since it is larger than the sum of its proper divisors (1).

990444629 is an equidigital number, since it uses as much as digits as its factorization.

990444629 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 559872, while the sum is 47.

The square root of 990444629 is about 31471.3302705812. The cubic root of 990444629 is about 996.8046771199.

The spelling of 990444629 in words is "nine hundred ninety million, four hundred forty-four thousand, six hundred twenty-nine".