612217117 has 2 divisors, whose sum is σ = 612217118. Its totient is φ = 612217116.

The previous prime is 612217091. The next prime is 612217127. The reversal of 612217117 is 711712216.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 416608921 + 195608196 = 20411^2 + 13986^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-612217117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (612217127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306108558 + 306108559.

It is an arithmetic number, because the mean of its divisors is an integer number (306108559).

Almost surely, 2^612217117 is an apocalyptic number.

It is an amenable number.

612217117 is a deficient number, since it is larger than the sum of its proper divisors (1).

612217117 is an equidigital number, since it uses as much as digits as its factorization.

612217117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1176, while the sum is 28.

The square root of 612217117 is about 24743.0215818521. The cubic root of 612217117 is about 849.1188640659.

The spelling of 612217117 in words is "six hundred twelve million, two hundred seventeen thousand, one hundred seventeen".