123695089681 has 2 divisors, whose sum is σ = 123695089682. Its totient is φ = 123695089680.

The previous prime is 123695089669. The next prime is 123695089711. The reversal of 123695089681 is 186980596321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82030115281 + 41664974400 = 286409^2 + 204120^2 .

It is a cyclic number.

It is not a de Polignac number, because 123695089681 - 2¹⁵ = 123695056913 is a prime.

It is a super-2 number, since 2×123695089681² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (123695089621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61847544840 + 61847544841.

It is an arithmetic number, because the mean of its divisors is an integer number (61847544841).

Almost surely, 2^123695089681 is an apocalyptic number.

It is an amenable number.

123695089681 is a deficient number, since it is larger than the sum of its proper divisors (1).

123695089681 is an equidigital number, since it uses as much as digits as its factorization.

123695089681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5598720, while the sum is 58.

The spelling of 123695089681 in words is "one hundred twenty-three billion, six hundred ninety-five million, eighty-nine thousand, six hundred eighty-one".