113513821 has 2 divisors, whose sum is σ = 113513822. Its totient is φ = 113513820.

The previous prime is 113513791. The next prime is 113513831. The reversal of 113513821 is 128315311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77633721 + 35880100 = 8811^2 + 5990^2 .

It is a cyclic number.

It is not a de Polignac number, because 113513821 - 2¹³ = 113505629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (113513831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56756910 + 56756911.

It is an arithmetic number, because the mean of its divisors is an integer number (56756911).

Almost surely, 2^113513821 is an apocalyptic number.

It is an amenable number.

113513821 is a deficient number, since it is larger than the sum of its proper divisors (1).

113513821 is an equidigital number, since it uses as much as digits as its factorization.

113513821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 720, while the sum is 25.

The square root of 113513821 is about 10654.2865082557. The cubic root of 113513821 is about 484.1904815101.

The spelling of 113513821 in words is "one hundred thirteen million, five hundred thirteen thousand, eight hundred twenty-one".