1123656366397 has 2 divisors, whose sum is σ = 1123656366398. Its totient is φ = 1123656366396.

The previous prime is 1123656366293. The next prime is 1123656366403. The reversal of 1123656366397 is 7936636563211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1123237509241 + 418857156 = 1059829^2 + 20466^2 .

It is a cyclic number.

It is not a de Polignac number, because 1123656366397 - 2²³ = 1123647977789 is a prime.

It is a super-2 number, since 2×1123656366397² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1123656366997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561828183198 + 561828183199.

It is an arithmetic number, because the mean of its divisors is an integer number (561828183199).

Almost surely, 2^{1123656366397} is an apocalyptic number.

It is an amenable number.

1123656366397 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123656366397 is an equidigital number, since it uses as much as digits as its factorization.

1123656366397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22044960, while the sum is 58.

The spelling of 1123656366397 in words is "one trillion, one hundred twenty-three billion, six hundred fifty-six million, three hundred sixty-six thousand, three hundred ninety-seven".