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113431 = 671693
BaseRepresentation
bin11011101100010111
312202121011
4123230113
512112211
62233051
7651463
oct335427
9182534
10113431
117824a
1255787
133c826
142d4a3
1523921
hex1bb17

113431 has 4 divisors (see below), whose sum is σ = 115192. Its totient is φ = 111672.

The previous prime is 113417. The next prime is 113437. The reversal of 113431 is 134311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 134311 = 197069.

It is a cyclic number.

It is not a de Polignac number, because 113431 - 29 = 112919 is a prime.

It is a super-2 number, since 2×1134312 = 25733183522, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

113431 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113437) 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 in 3 ways as a sum of consecutive naturals, for example, 780 + ... + 913.

It is an arithmetic number, because the mean of its divisors is an integer number (28798).

2113431 is an apocalyptic number.

113431 is a deficient number, since it is larger than the sum of its proper divisors (1761).

113431 is an equidigital number, since it uses as much as digits as its factorization.

113431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1760.

The product of its digits is 36, while the sum is 13.

The square root of 113431 is about 336.7951899894. The cubic root of 113431 is about 48.4072695863.

Adding to 113431 its reverse (134311), we get a palindrome (247742).

The spelling of 113431 in words is "one hundred thirteen thousand, four hundred thirty-one".

Divisors: 1 67 1693 113431