990622141 has 2 divisors, whose sum is σ = 990622142. Its totient is φ = 990622140.

The previous prime is 990622111. The next prime is 990622153. The reversal of 990622141 is 141226099.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 977812900 + 12809241 = 31270^2 + 3579^2 .

It is a cyclic number.

It is not a de Polignac number, because 990622141 - 2⁵ = 990622109 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 990622097 and 990622106.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (990622111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495311070 + 495311071.

It is an arithmetic number, because the mean of its divisors is an integer number (495311071).

Almost surely, 2^990622141 is an apocalyptic number.

It is an amenable number.

990622141 is a deficient number, since it is larger than the sum of its proper divisors (1).

990622141 is an equidigital number, since it uses as much as digits as its factorization.

990622141 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 990622141 is about 31474.1503618446. The cubic root of 990622141 is about 996.8642241882.

The spelling of 990622141 in words is "nine hundred ninety million, six hundred twenty-two thousand, one hundred forty-one".