123811429 has 16 divisors (see below), whose sum is σ = 149834880. Its totient is φ = 99938880.

The previous prime is 123811417. The next prime is 123811447. The reversal of 123811429 is 924118321.

It is a cyclic number.

It is not a de Polignac number, because 123811429 - 2⁵ = 123811397 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123811429.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123811229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20319 + ... + 25699.

It is an arithmetic number, because the mean of its divisors is an integer number (9364680).

Almost surely, 2^123811429 is an apocalyptic number.

123811429 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

123811429 is a deficient number, since it is larger than the sum of its proper divisors (26023451).

123811429 is a wasteful number, since it uses less digits than its factorization.

123811429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5580.

The product of its digits is 3456, while the sum is 31.

The square root of 123811429 is about 11127.0584163111. The cubic root of 123811429 is about 498.4101890265.

The spelling of 123811429 in words is "one hundred twenty-three million, eight hundred eleven thousand, four hundred twenty-nine".