113621 has 2 divisors, whose sum is σ = 113622. Its totient is φ = 113620.

The previous prime is 113591. The next prime is 113623. The reversal of 113621 is 126311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96721 + 16900 = 311^2 + 130^2 .

It is an emirp because it is prime and its reverse (126311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 113621 - 2⁶ = 113557 is a prime.

Together with 113623, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 113596 and 113605.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 113621.

It is not a weakly prime, because it can be changed into another prime (113623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56810 + 56811.

It is an arithmetic number, because the mean of its divisors is an integer number (56811).

2¹¹³⁶²¹ is an apocalyptic number.

It is an amenable number.

113621 is a deficient number, since it is larger than the sum of its proper divisors (1).

113621 is an equidigital number, since it uses as much as digits as its factorization.

113621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36, while the sum is 14.

The square root of 113621 is about 337.0771425060. The cubic root of 113621 is about 48.4342823392.

Adding to 113621 its reverse (126311), we get a palindrome (239932).

The spelling of 113621 in words is "one hundred thirteen thousand, six hundred twenty-one".