990250473101 has 2 divisors, whose sum is σ = 990250473102. Its totient is φ = 990250473100.

The previous prime is 990250473071. The next prime is 990250473139. The reversal of 990250473101 is 101374052099.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 958029864100 + 32220609001 = 978790^2 + 179501^2 .

It is a cyclic number.

It is not a de Polignac number, because 990250473101 - 2¹⁰ = 990250472077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (990250473301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495125236550 + 495125236551.

It is an arithmetic number, because the mean of its divisors is an integer number (495125236551).

Almost surely, 2^990250473101 is an apocalyptic number.

It is an amenable number.

990250473101 is a deficient number, since it is larger than the sum of its proper divisors (1).

990250473101 is an equidigital number, since it uses as much as digits as its factorization.

990250473101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 68040, while the sum is 41.

The spelling of 990250473101 in words is "nine hundred ninety billion, two hundred fifty million, four hundred seventy-three thousand, one hundred one".