231118739 has 2 divisors, whose sum is σ = 231118740. Its totient is φ = 231118738.

The previous prime is 231118673. The next prime is 231118781. The reversal of 231118739 is 937811132.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231118739 - 2¹⁶ = 231053203 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231118699 and 231118708.

It is not a weakly prime, because it can be changed into another prime (231118439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115559369 + 115559370.

It is an arithmetic number, because the mean of its divisors is an integer number (115559370).

Almost surely, 2^231118739 is an apocalyptic number.

231118739 is a deficient number, since it is larger than the sum of its proper divisors (1).

231118739 is an equidigital number, since it uses as much as digits as its factorization.

231118739 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 35.

The square root of 231118739 is about 15202.5898780438. The cubic root of 231118739 is about 613.6843569622.

The spelling of 231118739 in words is "two hundred thirty-one million, one hundred eighteen thousand, seven hundred thirty-nine".