123995899 has 2 divisors, whose sum is σ = 123995900. Its totient is φ = 123995898.

The previous prime is 123995897. The next prime is 123995903. The reversal of 123995899 is 998599321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123995899 - 2¹ = 123995897 is a prime.

Together with 123995897, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (123995897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61997949 + 61997950.

It is an arithmetic number, because the mean of its divisors is an integer number (61997950).

Almost surely, 2^123995899 is an apocalyptic number.

123995899 is a deficient number, since it is larger than the sum of its proper divisors (1).

123995899 is an equidigital number, since it uses as much as digits as its factorization.

123995899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1574640, while the sum is 55.

The square root of 123995899 is about 11135.3445838016. The cubic root of 123995899 is about 498.6575978048.

The spelling of 123995899 in words is "one hundred twenty-three million, nine hundred ninety-five thousand, eight hundred ninety-nine".