990622153 has 2 divisors, whose sum is σ = 990622154. Its totient is φ = 990622152.

The previous prime is 990622141. The next prime is 990622189. The reversal of 990622153 is 351226099.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 644550544 + 346071609 = 25388^2 + 18603^2 .

It is a cyclic number.

It is not a de Polignac number, because 990622153 - 2⁹ = 990621641 is a prime.

It is not a weakly prime, because it can be changed into another prime (990622253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495311076 + 495311077.

It is an arithmetic number, because the mean of its divisors is an integer number (495311077).

Almost surely, 2^990622153 is an apocalyptic number.

It is an amenable number.

990622153 is a deficient number, since it is larger than the sum of its proper divisors (1).

990622153 is an equidigital number, since it uses as much as digits as its factorization.

990622153 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29160, while the sum is 37.

The square root of 990622153 is about 31474.1505524772. The cubic root of 990622153 is about 996.8642282134.

The spelling of 990622153 in words is "nine hundred ninety million, six hundred twenty-two thousand, one hundred fifty-three".