612813689 has 2 divisors, whose sum is σ = 612813690. Its totient is φ = 612813688.

The previous prime is 612813667. The next prime is 612813697. The reversal of 612813689 is 986318216.

612813689 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 can be written as a sum of positive squares in only one way, i.e., 610831225 + 1982464 = 24715^2 + 1408^2 .

It is a cyclic number.

It is not a de Polignac number, because 612813689 - 2²⁸ = 344378233 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (612213689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306406844 + 306406845.

It is an arithmetic number, because the mean of its divisors is an integer number (306406845).

Almost surely, 2^612813689 is an apocalyptic number.

It is an amenable number.

612813689 is a deficient number, since it is larger than the sum of its proper divisors (1).

612813689 is an equidigital number, since it uses as much as digits as its factorization.

612813689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 44.

The square root of 612813689 is about 24755.0740051408. The cubic root of 612813689 is about 849.3945811143.

The spelling of 612813689 in words is "six hundred twelve million, eight hundred thirteen thousand, six hundred eighty-nine".