123196661 has 16 divisors (see below), whose sum is σ = 143786880. Its totient is φ = 103369920.

The previous prime is 123196657. The next prime is 123196663. The reversal of 123196661 is 166691321.

It is a cyclic number.

It is not a de Polignac number, because 123196661 - 2² = 123196657 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123196663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130451 + ... + 131391.

It is an arithmetic number, because the mean of its divisors is an integer number (8986680).

Almost surely, 2^123196661 is an apocalyptic number.

It is an amenable number.

123196661 is a deficient number, since it is larger than the sum of its proper divisors (20590219).

123196661 is an equidigital number, since it uses as much as digits as its factorization.

123196661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1324.

The product of its digits is 11664, while the sum is 35.

The square root of 123196661 is about 11099.3991278808. The cubic root of 123196661 is about 497.5838916465.

The spelling of 123196661 in words is "one hundred twenty-three million, one hundred ninety-six thousand, six hundred sixty-one".