2123434289 has 2 divisors, whose sum is σ = 2123434290. Its totient is φ = 2123434288.

The previous prime is 2123434279. The next prime is 2123434309. The reversal of 2123434289 is 9824343212.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1254363889 + 869070400 = 35417^2 + 29480^2 .

It is a cyclic number.

It is not a de Polignac number, because 2123434289 - 2¹² = 2123430193 is a prime.

It is not a weakly prime, because it can be changed into another prime (2123434279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061717144 + 1061717145.

It is an arithmetic number, because the mean of its divisors is an integer number (1061717145).

Almost surely, 2^2123434289 is an apocalyptic number.

It is an amenable number.

2123434289 is a deficient number, since it is larger than the sum of its proper divisors (1).

2123434289 is an equidigital number, since it uses as much as digits as its factorization.

2123434289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 38.

The square root of 2123434289 is about 46080.7366369072. The cubic root of 2123434289 is about 1285.3249621495.

The spelling of 2123434289 in words is "two billion, one hundred twenty-three million, four hundred thirty-four thousand, two hundred eighty-nine".