90711571 has 2 divisors, whose sum is σ = 90711572. Its totient is φ = 90711570.

The previous prime is 90711527. The next prime is 90711629. The reversal of 90711571 is 17511709.

It is a weak prime.

It is an emirp because it is prime and its reverse (17511709) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90711571 - 2⁷ = 90711443 is a prime.

It is a super-2 number, since 2×90711571² = 16457178226576082, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (90711521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45355785 + 45355786.

It is an arithmetic number, because the mean of its divisors is an integer number (45355786).

Almost surely, 2^90711571 is an apocalyptic number.

90711571 is a deficient number, since it is larger than the sum of its proper divisors (1).

90711571 is an equidigital number, since it uses as much as digits as its factorization.

90711571 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2205, while the sum is 31.

The square root of 90711571 is about 9524.2622286453. The cubic root of 90711571 is about 449.3184266413.

The spelling of 90711571 in words is "ninety million, seven hundred eleven thousand, five hundred seventy-one".