123687723 has 6 divisors (see below), whose sum is σ = 164942652. Its totient is φ = 82445640.

The previous prime is 123687719. The next prime is 123687727. The reversal of 123687723 is 327786321.

It is an interprime number because it is at equal distance from previous prime (123687719) and next prime (123687727).

It is not a de Polignac number, because 123687723 - 2² = 123687719 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123687727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16053 + ... + 22473.

It is an arithmetic number, because the mean of its divisors is an integer number (27490442).

Almost surely, 2^123687723 is an apocalyptic number.

123687723 is a deficient number, since it is larger than the sum of its proper divisors (41254929).

123687723 is an frugal number, since it uses more digits than its factorization.

123687723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12845 (or 6424 counting only the distinct ones).

The product of its digits is 84672, while the sum is 39.

The square root of 123687723 is about 11121.4982353998. The cubic root of 123687723 is about 498.2441384517.

Multiplying 123687723 by its product of digits (84672), we get a square (10472886881856 = 3236184²).

The spelling of 123687723 in words is "one hundred twenty-three million, six hundred eighty-seven thousand, seven hundred twenty-three".