123816461 has 2 divisors, whose sum is σ = 123816462. Its totient is φ = 123816460.

The previous prime is 123816443. The next prime is 123816487. The reversal of 123816461 is 164618321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114169225 + 9647236 = 10685^2 + 3106^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123816461 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123816421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61908230 + 61908231.

It is an arithmetic number, because the mean of its divisors is an integer number (61908231).

Almost surely, 2^123816461 is an apocalyptic number.

It is an amenable number.

123816461 is a deficient number, since it is larger than the sum of its proper divisors (1).

123816461 is an equidigital number, since it uses as much as digits as its factorization.

123816461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 32.

The square root of 123816461 is about 11127.2845294798. The cubic root of 123816461 is about 498.4169411390.

The spelling of 123816461 in words is "one hundred twenty-three million, eight hundred sixteen thousand, four hundred sixty-one".