123660653 has 2 divisors, whose sum is σ = 123660654. Its totient is φ = 123660652.

The previous prime is 123660631. The next prime is 123660671. The reversal of 123660653 is 356066321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73222249 + 50438404 = 8557^2 + 7102^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123660653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123660853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61830326 + 61830327.

It is an arithmetic number, because the mean of its divisors is an integer number (61830327).

Almost surely, 2^123660653 is an apocalyptic number.

It is an amenable number.

123660653 is a deficient number, since it is larger than the sum of its proper divisors (1).

123660653 is an equidigital number, since it uses as much as digits as its factorization.

123660653 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 32.

The square root of 123660653 is about 11120.2811565176. The cubic root of 123660653 is about 498.2077876251.

The spelling of 123660653 in words is "one hundred twenty-three million, six hundred sixty thousand, six hundred fifty-three".