123807899 has 2 divisors, whose sum is σ = 123807900. Its totient is φ = 123807898.

The previous prime is 123807877. The next prime is 123807913. The reversal of 123807899 is 998708321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123807899 - 2¹² = 123803803 is a prime.

It is not a weakly prime, because it can be changed into another prime (123807839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61903949 + 61903950.

It is an arithmetic number, because the mean of its divisors is an integer number (61903950).

Almost surely, 2^123807899 is an apocalyptic number.

123807899 is a deficient number, since it is larger than the sum of its proper divisors (1).

123807899 is an equidigital number, since it uses as much as digits as its factorization.

123807899 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 123807899 is about 11126.8997928444. The cubic root of 123807899 is about 498.4054522406.

The spelling of 123807899 in words is "one hundred twenty-three million, eight hundred seven thousand, eight hundred ninety-nine".