90823771 has 2 divisors, whose sum is σ = 90823772. Its totient is φ = 90823770.

The previous prime is 90823727. The next prime is 90823807. The reversal of 90823771 is 17732809.

It is a strong prime.

It is an emirp because it is prime and its reverse (17732809) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90823771 - 2⁹ = 90823259 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90823771.

It is not a weakly prime, because it can be changed into another prime (90823871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45411885 + 45411886.

It is an arithmetic number, because the mean of its divisors is an integer number (45411886).

Almost surely, 2^90823771 is an apocalyptic number.

90823771 is a deficient number, since it is larger than the sum of its proper divisors (1).

90823771 is an equidigital number, since it uses as much as digits as its factorization.

90823771 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 90823771 is about 9530.1506284004. The cubic root of 90823771 is about 449.5036024166.

The spelling of 90823771 in words is "ninety million, eight hundred twenty-three thousand, seven hundred seventy-one".