123145699 has 2 divisors, whose sum is σ = 123145700. Its totient is φ = 123145698.

The previous prime is 123145691. The next prime is 123145727. The reversal of 123145699 is 996541321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123145699 - 2³ = 123145691 is a prime.

It is not a weakly prime, because it can be changed into another prime (123145691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61572849 + 61572850.

It is an arithmetic number, because the mean of its divisors is an integer number (61572850).

Almost surely, 2^123145699 is an apocalyptic number.

123145699 is a deficient number, since it is larger than the sum of its proper divisors (1).

123145699 is an equidigital number, since it uses as much as digits as its factorization.

123145699 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58320, while the sum is 40.

The square root of 123145699 is about 11097.1031805602. The cubic root of 123145699 is about 497.5152713678.

The spelling of 123145699 in words is "one hundred twenty-three million, one hundred forty-five thousand, six hundred ninety-nine".