123699 has 4 divisors (see below), whose sum is σ = 164936. Its totient is φ = 82464.

The previous prime is 123677. The next prime is 123701. The reversal of 123699 is 996321.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 123699 - 2⁵ = 123667 is a prime.

It is a D-number.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a zygodrome in base 2.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 123699.

It is not an unprimeable number, because it can be changed into a prime (123619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20614 + ... + 20619.

It is an arithmetic number, because the mean of its divisors is an integer number (41234).

2¹²³⁶⁹⁹ is an apocalyptic number.

123699 is a deficient number, since it is larger than the sum of its proper divisors (41237).

123699 is an equidigital number, since it uses as much as digits as its factorization.

123699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41236.

The product of its digits is 2916, while the sum is 30.

The square root of 123699 is about 351.7086862732. The cubic root of 123699 is about 49.8259280155.

The spelling of 123699 in words is "one hundred twenty-three thousand, six hundred ninety-nine".