900982781 has 2 divisors, whose sum is σ = 900982782. Its totient is φ = 900982780.

The previous prime is 900982769. The next prime is 900982799. The reversal of 900982781 is 187289009.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 455139556 + 445843225 = 21334^2 + 21115^2 .

It is an emirp because it is prime and its reverse (187289009) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 900982781 - 2¹⁴ = 900966397 is a prime.

It is a super-2 number, since 2×900982781² = 1623539943316987922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (900982751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 450491390 + 450491391.

It is an arithmetic number, because the mean of its divisors is an integer number (450491391).

Almost surely, 2^900982781 is an apocalyptic number.

It is an amenable number.

900982781 is a deficient number, since it is larger than the sum of its proper divisors (1).

900982781 is an equidigital number, since it uses as much as digits as its factorization.

900982781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 44.

The square root of 900982781 is about 30016.3752142060. The cubic root of 900982781 is about 965.8406881065.

The spelling of 900982781 in words is "nine hundred million, nine hundred eighty-two thousand, seven hundred eighty-one".