611309117 has 2 divisors, whose sum is σ = 611309118. Its totient is φ = 611309116.

The previous prime is 611309053. The next prime is 611309129. The reversal of 611309117 is 711903116.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 392594596 + 218714521 = 19814^2 + 14789^2 .

It is a cyclic number.

It is not a de Polignac number, because 611309117 - 2⁶ = 611309053 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 611309117.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (611309147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305654558 + 305654559.

It is an arithmetic number, because the mean of its divisors is an integer number (305654559).

Almost surely, 2^611309117 is an apocalyptic number.

It is an amenable number.

611309117 is a deficient number, since it is larger than the sum of its proper divisors (1).

611309117 is an equidigital number, since it uses as much as digits as its factorization.

611309117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1134, while the sum is 29.

The square root of 611309117 is about 24724.6661655926. Note that the first 3 decimals coincide. The cubic root of 611309117 is about 848.6988706861.

The spelling of 611309117 in words is "six hundred eleven million, three hundred nine thousand, one hundred seventeen".