612608861 has 2 divisors, whose sum is σ = 612608862. Its totient is φ = 612608860.

The previous prime is 612608813. The next prime is 612608869. The reversal of 612608861 is 168806216.

612608861 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., 466344025 + 146264836 = 21595^2 + 12094^2 .

It is a cyclic number.

It is not a de Polignac number, because 612608861 - 2¹⁰ = 612607837 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (612608869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306304430 + 306304431.

It is an arithmetic number, because the mean of its divisors is an integer number (306304431).

Almost surely, 2^612608861 is an apocalyptic number.

It is an amenable number.

612608861 is a deficient number, since it is larger than the sum of its proper divisors (1).

612608861 is an equidigital number, since it uses as much as digits as its factorization.

612608861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 612608861 is about 24750.9365681382. The cubic root of 612608861 is about 849.2999361546.

The spelling of 612608861 in words is "six hundred twelve million, six hundred eight thousand, eight hundred sixty-one".