113720381 has 2 divisors, whose sum is σ = 113720382. Its totient is φ = 113720380.

The previous prime is 113720359. The next prime is 113720389. The reversal of 113720381 is 183027311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101707225 + 12013156 = 10085^2 + 3466^2 .

It is a cyclic number.

It is not a de Polignac number, because 113720381 - 2¹⁰ = 113719357 is a prime.

It is a super-2 number, since 2×113720381² = 25864650109570322, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 113720381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (113720389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56860190 + 56860191.

It is an arithmetic number, because the mean of its divisors is an integer number (56860191).

Almost surely, 2^113720381 is an apocalyptic number.

It is an amenable number.

113720381 is a deficient number, since it is larger than the sum of its proper divisors (1).

113720381 is an equidigital number, since it uses as much as digits as its factorization.

113720381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 113720381 is about 10663.9758533110. The cubic root of 113720381 is about 484.4839957893.

Adding to 113720381 its reverse (183027311), we get a palindrome (296747692).

The spelling of 113720381 in words is "one hundred thirteen million, seven hundred twenty thousand, three hundred eighty-one".