123816947 has 2 divisors, whose sum is σ = 123816948. Its totient is φ = 123816946.

The previous prime is 123816907. The next prime is 123816961. The reversal of 123816947 is 749618321.

It is a strong prime.

It is an emirp because it is prime and its reverse (749618321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123816947 - 2⁸ = 123816691 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (123816907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61908473 + 61908474.

It is an arithmetic number, because the mean of its divisors is an integer number (61908474).

Almost surely, 2^123816947 is an apocalyptic number.

123816947 is a deficient number, since it is larger than the sum of its proper divisors (1).

123816947 is an equidigital number, since it uses as much as digits as its factorization.

123816947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 41.

The square root of 123816947 is about 11127.3063676705. The cubic root of 123816947 is about 498.4175932610.

The spelling of 123816947 in words is "one hundred twenty-three million, eight hundred sixteen thousand, nine hundred forty-seven".