123769 has 4 divisors (see below), whose sum is σ = 125860. Its totient is φ = 121680.

The previous prime is 123757. The next prime is 123787. The reversal of 123769 is 967321.

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

It can be written as a sum of positive squares in 2 ways, for example, as 67600 + 56169 = 260^2 + 237^2 .

It is a cyclic number.

It is not a de Polignac number, because 123769 - 2⁵ = 123737 is a prime.

It is a super-2 number, since 2×123769² = 30637530722, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (123719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 954 + ... + 1075.

It is an arithmetic number, because the mean of its divisors is an integer number (31465).

2¹²³⁷⁶⁹ is an apocalyptic number.

It is an amenable number.

123769 is a deficient number, since it is larger than the sum of its proper divisors (2091).

123769 is an equidigital number, since it uses as much as digits as its factorization.

123769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2090.

The product of its digits is 2268, while the sum is 28.

The square root of 123769 is about 351.8081863743. The cubic root of 123769 is about 49.8353249043.

The spelling of 123769 in words is "one hundred twenty-three thousand, seven hundred sixty-nine".