612885509 has 2 divisors, whose sum is σ = 612885510. Its totient is φ = 612885508.

The previous prime is 612885487. The next prime is 612885521. The reversal of 612885509 is 905588216.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 443313025 + 169572484 = 21055^2 + 13022^2 .

It is a cyclic number.

It is not a de Polignac number, because 612885509 - 2⁸ = 612885253 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 612885509.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (612885599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306442754 + 306442755.

It is an arithmetic number, because the mean of its divisors is an integer number (306442755).

Almost surely, 2^612885509 is an apocalyptic number.

It is an amenable number.

612885509 is a deficient number, since it is larger than the sum of its proper divisors (1).

612885509 is an equidigital number, since it uses as much as digits as its factorization.

612885509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 172800, while the sum is 44.

The square root of 612885509 is about 24756.5245743420. The cubic root of 612885509 is about 849.4277620179.

The spelling of 612885509 in words is "six hundred twelve million, eight hundred eighty-five thousand, five hundred nine".