113085821 has 2 divisors, whose sum is σ = 113085822. Its totient is φ = 113085820.

The previous prime is 113085811. The next prime is 113085827. The reversal of 113085821 is 128580311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56625625 + 56460196 = 7525^2 + 7514^2 .

It is an emirp because it is prime and its reverse (128580311) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-113085821 is a prime.

It is a super-2 number, since 2×113085821² = 25576805822488082, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (113085827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56542910 + 56542911.

It is an arithmetic number, because the mean of its divisors is an integer number (56542911).

Almost surely, 2^113085821 is an apocalyptic number.

It is an amenable number.

113085821 is a deficient number, since it is larger than the sum of its proper divisors (1).

113085821 is an equidigital number, since it uses as much as digits as its factorization.

113085821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 29.

The square root of 113085821 is about 10634.1817268655. The cubic root of 113085821 is about 483.5811738303.

The spelling of 113085821 in words is "one hundred thirteen million, eighty-five thousand, eight hundred twenty-one".