Search a number
-
+
123911 is a prime number
BaseRepresentation
bin11110010000000111
320021222022
4132100013
512431121
62353355
71024154
oct362007
9207868
10123911
1185107
125b85b
1344528
143322b
1526aab
hex1e407

123911 has 2 divisors, whose sum is σ = 123912. Its totient is φ = 123910.

The previous prime is 123887. The next prime is 123923. The reversal of 123911 is 119321.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (119321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123911 - 210 = 122887 is a prime.

It is a plaindrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 123911.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61955 + 61956.

It is an arithmetic number, because the mean of its divisors is an integer number (61956).

2123911 is an apocalyptic number.

123911 is a deficient number, since it is larger than the sum of its proper divisors (1).

123911 is an equidigital number, since it uses as much as digits as its factorization.

123911 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54, while the sum is 17.

The square root of 123911 is about 352.0099430414. The cubic root of 123911 is about 49.8543762864.

The spelling of 123911 in words is "one hundred twenty-three thousand, nine hundred eleven".