123666253 has 2 divisors, whose sum is σ = 123666254. Its totient is φ = 123666252.

The previous prime is 123666251. The next prime is 123666271. The reversal of 123666253 is 352666321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116251524 + 7414729 = 10782^2 + 2723^2 .

It is a cyclic number.

It is not a de Polignac number, because 123666253 - 2¹ = 123666251 is a prime.

Together with 123666251, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123666251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61833126 + 61833127.

It is an arithmetic number, because the mean of its divisors is an integer number (61833127).

Almost surely, 2^123666253 is an apocalyptic number.

It is an amenable number.

123666253 is a deficient number, since it is larger than the sum of its proper divisors (1).

123666253 is an equidigital number, since it uses as much as digits as its factorization.

123666253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 34.

The square root of 123666253 is about 11120.5329458619. The cubic root of 123666253 is about 498.2153079949.

The spelling of 123666253 in words is "one hundred twenty-three million, six hundred sixty-six thousand, two hundred fifty-three".