113839421 has 2 divisors, whose sum is σ = 113839422. Its totient is φ = 113839420.

The previous prime is 113839399. The next prime is 113839433. The reversal of 113839421 is 124938311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 104755225 + 9084196 = 10235^2 + 3014^2 .

It is a cyclic number.

It is not a de Polignac number, because 113839421 - 2¹⁰ = 113838397 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (113839441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56919710 + 56919711.

It is an arithmetic number, because the mean of its divisors is an integer number (56919711).

Almost surely, 2^113839421 is an apocalyptic number.

It is an amenable number.

113839421 is a deficient number, since it is larger than the sum of its proper divisors (1).

113839421 is an equidigital number, since it uses as much as digits as its factorization.

113839421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 32.

The square root of 113839421 is about 10669.5558014380. Note that the first 3 decimals coincide. The cubic root of 113839421 is about 484.6529859106.

The spelling of 113839421 in words is "one hundred thirteen million, eight hundred thirty-nine thousand, four hundred twenty-one".