11731939 has 2 divisors, whose sum is σ = 11731940. Its totient is φ = 11731938.

The previous prime is 11731933. The next prime is 11731943. The reversal of 11731939 is 93913711.

11731939 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11731939 - 2¹⁷ = 11600867 is a prime.

It is not a weakly prime, because it can be changed into another prime (11731933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5865969 + 5865970.

It is an arithmetic number, because the mean of its divisors is an integer number (5865970).

Almost surely, 2^11731939 is an apocalyptic number.

11731939 is a deficient number, since it is larger than the sum of its proper divisors (1).

11731939 is an equidigital number, since it uses as much as digits as its factorization.

11731939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5103, while the sum is 34.

The square root of 11731939 is about 3425.1918194460. The cubic root of 11731939 is about 227.2252546131.

The spelling of 11731939 in words is "eleven million, seven hundred thirty-one thousand, nine hundred thirty-nine".