113039821 has 2 divisors, whose sum is σ = 113039822. Its totient is φ = 113039820.

The previous prime is 113039813. The next prime is 113039827. The reversal of 113039821 is 128930311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101404900 + 11634921 = 10070^2 + 3411^2 .

It is a cyclic number.

It is not a de Polignac number, because 113039821 - 2³ = 113039813 is a prime.

It is a super-3 number, since 3×113039821³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 113039821.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (113039827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56519910 + 56519911.

It is an arithmetic number, because the mean of its divisors is an integer number (56519911).

Almost surely, 2^113039821 is an apocalyptic number.

It is an amenable number.

113039821 is a deficient number, since it is larger than the sum of its proper divisors (1).

113039821 is an equidigital number, since it uses as much as digits as its factorization.

113039821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 113039821 is about 10632.0186700363. The cubic root of 113039821 is about 483.5155960515.

The spelling of 113039821 in words is "one hundred thirteen million, thirty-nine thousand, eight hundred twenty-one".