612863917 has 2 divisors, whose sum is σ = 612863918. Its totient is φ = 612863916.

The previous prime is 612863899. The next prime is 612863983. The reversal of 612863917 is 719368216.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 609645481 + 3218436 = 24691^2 + 1794^2 .

It is a cyclic number.

It is not a de Polignac number, because 612863917 - 2⁷ = 612863789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (612863117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306431958 + 306431959.

It is an arithmetic number, because the mean of its divisors is an integer number (306431959).

Almost surely, 2^612863917 is an apocalyptic number.

It is an amenable number.

612863917 is a deficient number, since it is larger than the sum of its proper divisors (1).

612863917 is an equidigital number, since it uses as much as digits as its factorization.

612863917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 43.

The square root of 612863917 is about 24756.0884834418. The cubic root of 612863917 is about 849.4177867673.

The spelling of 612863917 in words is "six hundred twelve million, eight hundred sixty-three thousand, nine hundred seventeen".