2331947789 has 2 divisors, whose sum is σ = 2331947790. Its totient is φ = 2331947788.

The previous prime is 2331947777. The next prime is 2331947861. The reversal of 2331947789 is 9877491332.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1399134025 + 932813764 = 37405^2 + 30542^2 .

It is a cyclic number.

It is not a de Polignac number, because 2331947789 - 2⁴ = 2331947773 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2331947789.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2331947719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1165973894 + 1165973895.

It is an arithmetic number, because the mean of its divisors is an integer number (1165973895).

Almost surely, 2^2331947789 is an apocalyptic number.

It is an amenable number.

2331947789 is a deficient number, since it is larger than the sum of its proper divisors (1).

2331947789 is an equidigital number, since it uses as much as digits as its factorization.

2331947789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2286144, while the sum is 53.

The square root of 2331947789 is about 48290.2452779027. The cubic root of 2331947789 is about 1326.0898192144.

The spelling of 2331947789 in words is "two billion, three hundred thirty-one million, nine hundred forty-seven thousand, seven hundred eighty-nine".