231148739 has 2 divisors, whose sum is σ = 231148740. Its totient is φ = 231148738.

The previous prime is 231148721. The next prime is 231148747. The reversal of 231148739 is 937841132.

231148739 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 231148739 - 2²⁰ = 230100163 is a prime.

It is not a weakly prime, because it can be changed into another prime (231148759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115574369 + 115574370.

It is an arithmetic number, because the mean of its divisors is an integer number (115574370).

Almost surely, 2^231148739 is an apocalyptic number.

231148739 is a deficient number, since it is larger than the sum of its proper divisors (1).

231148739 is an equidigital number, since it uses as much as digits as its factorization.

231148739 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 38.

The square root of 231148739 is about 15203.5765200166. The cubic root of 231148739 is about 613.7109085871.

The spelling of 231148739 in words is "two hundred thirty-one million, one hundred forty-eight thousand, seven hundred thirty-nine".