Search a number
-
+
90931 is a prime number
BaseRepresentation
bin10110001100110011
311121201211
4112030303
510402211
61540551
7526051
oct261463
9147654
1090931
1162355
1244757
1332509
14251d1
151be21
hex16333

90931 has 2 divisors, whose sum is σ = 90932. Its totient is φ = 90930.

The previous prime is 90917. The next prime is 90947. The reversal of 90931 is 13909.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90931 - 27 = 90803 is a prime.

It is a super-2 number, since 2×909312 = 16536893522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (90901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45465 + 45466.

It is an arithmetic number, because the mean of its divisors is an integer number (45466).

290931 is an apocalyptic number.

90931 is a deficient number, since it is larger than the sum of its proper divisors (1).

90931 is an equidigital number, since it uses as much as digits as its factorization.

90931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 243, while the sum is 22.

The square root of 90931 is about 301.5476745060. The cubic root of 90931 is about 44.9680431548.

Subtracting from 90931 its sum of digits (22), we obtain a palindrome (90909).

The spelling of 90931 in words is "ninety thousand, nine hundred thirty-one".