123133749 has 16 divisors (see below), whose sum is σ = 168825600. Its totient is φ = 79789760.

The previous prime is 123133741. The next prime is 123133763. The reversal of 123133749 is 947331321.

It is a cyclic number.

It is not a de Polignac number, because 123133749 - 2³ = 123133741 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123133741) 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, 18079 + ... + 23939.

It is an arithmetic number, because the mean of its divisors is an integer number (10551600).

Almost surely, 2^123133749 is an apocalyptic number.

It is an amenable number.

123133749 is a deficient number, since it is larger than the sum of its proper divisors (45691851).

123133749 is a wasteful number, since it uses less digits than its factorization.

123133749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6060.

The product of its digits is 13608, while the sum is 33.

The square root of 123133749 is about 11096.5647386928. The cubic root of 123133749 is about 497.4991779655.

It can be divided in two parts, 1231 and 33749, that added together give a triangular number (34980 = T₂₆₄).

The spelling of 123133749 in words is "one hundred twenty-three million, one hundred thirty-three thousand, seven hundred forty-nine".