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90971 is a prime number
BaseRepresentation
bin10110001101011011
311121210022
4112031123
510402341
61541055
7526136
oct261533
9147708
1090971
1162391
124478b
133253a
142521d
151be4b
hex1635b

90971 has 2 divisors, whose sum is σ = 90972. Its totient is φ = 90970.

The previous prime is 90947. The next prime is 90977. The reversal of 90971 is 17909.

It is a strong prime.

It is an emirp because it is prime and its reverse (17909) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90971 - 26 = 90907 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is an Ulam number.

It is a plaindrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 90971.

It is not a weakly prime, because it can be changed into another prime (90977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45485 + 45486.

It is an arithmetic number, because the mean of its divisors is an integer number (45486).

290971 is an apocalyptic number.

90971 is a deficient number, since it is larger than the sum of its proper divisors (1).

90971 is an equidigital number, since it uses as much as digits as its factorization.

90971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 567, while the sum is 26.

The square root of 90971 is about 301.6139917179. The cubic root of 90971 is about 44.9746359121.

The spelling of 90971 in words is "ninety thousand, nine hundred seventy-one".