123387899 has 2 divisors, whose sum is σ = 123387900. Its totient is φ = 123387898.

The previous prime is 123387889. The next prime is 123387931. The reversal of 123387899 is 998783321.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123387899 - 2¹⁶ = 123322363 is a prime.

It is not a weakly prime, because it can be changed into another prime (123387829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61693949 + 61693950.

It is an arithmetic number, because the mean of its divisors is an integer number (61693950).

Almost surely, 2^123387899 is an apocalyptic number.

123387899 is a deficient number, since it is larger than the sum of its proper divisors (1).

123387899 is an equidigital number, since it uses as much as digits as its factorization.

123387899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 50.

The square root of 123387899 is about 11108.0105779568. The cubic root of 123387899 is about 497.8412247933.

The spelling of 123387899 in words is "one hundred twenty-three million, three hundred eighty-seven thousand, eight hundred ninety-nine".