2117923061 has 2 divisors, whose sum is σ = 2117923062. Its totient is φ = 2117923060.

The previous prime is 2117923057. The next prime is 2117923091. The reversal of 2117923061 is 1603297112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2083922500 + 34000561 = 45650^2 + 5831^2 .

It is a cyclic number.

It is not a de Polignac number, because 2117923061 - 2² = 2117923057 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2117923051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1058961530 + 1058961531.

It is an arithmetic number, because the mean of its divisors is an integer number (1058961531).

Almost surely, 2^2117923061 is an apocalyptic number.

It is an amenable number.

2117923061 is a deficient number, since it is larger than the sum of its proper divisors (1).

2117923061 is an equidigital number, since it uses as much as digits as its factorization.

2117923061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 2117923061 is about 46020.8980898896. The cubic root of 2117923061 is about 1284.2120078119.

The spelling of 2117923061 in words is "two billion, one hundred seventeen million, nine hundred twenty-three thousand, sixty-one".