123606215669 has 2 divisors, whose sum is σ = 123606215670. Its totient is φ = 123606215668.

The previous prime is 123606215657. The next prime is 123606215737. The reversal of 123606215669 is 966512606321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 93238622500 + 30367593169 = 305350^2 + 174263^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123606215669 is a prime.

It is a super-2 number, since 2×123606215669² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123606215269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61803107834 + 61803107835.

It is an arithmetic number, because the mean of its divisors is an integer number (61803107835).

Almost surely, 2^123606215669 is an apocalyptic number.

It is an amenable number.

123606215669 is a deficient number, since it is larger than the sum of its proper divisors (1).

123606215669 is an equidigital number, since it uses as much as digits as its factorization.

123606215669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 699840, while the sum is 47.

The spelling of 123606215669 in words is "one hundred twenty-three billion, six hundred six million, two hundred fifteen thousand, six hundred sixty-nine".