90084661 has 2 divisors, whose sum is σ = 90084662. Its totient is φ = 90084660.

The previous prime is 90084611. The next prime is 90084671. The reversal of 90084661 is 16648009.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89586225 + 498436 = 9465^2 + 706^2 .

It is a cyclic number.

It is not a de Polignac number, because 90084661 - 2¹⁵ = 90051893 is a prime.

It is a super-2 number, since 2×90084661² = 16230492294969842, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90084611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45042330 + 45042331.

It is an arithmetic number, because the mean of its divisors is an integer number (45042331).

Almost surely, 2^90084661 is an apocalyptic number.

It is an amenable number.

90084661 is a deficient number, since it is larger than the sum of its proper divisors (1).

90084661 is an equidigital number, since it uses as much as digits as its factorization.

90084661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 90084661 is about 9491.2939581492. The cubic root of 90084661 is about 448.2809492131.

The spelling of 90084661 in words is "ninety million, eighty-four thousand, six hundred sixty-one".