123139700 has 72 divisors (see below), whose sum is σ = 286564992. Its totient is φ = 45809280.

The previous prime is 123139699. The next prime is 123139733. The reversal of 123139700 is 7931321.

It is a self number, because there is not a number n which added to its sum of digits gives 123139700.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 84377 + ... + 85823.

Almost surely, 2^123139700 is an apocalyptic number.

123139700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123139700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (143282496).

123139700 is an abundant number, since it is smaller than the sum of its proper divisors (163425292).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123139700 is a wasteful number, since it uses less digits than its factorization.

123139700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1521 (or 1514 counting only the distinct ones).

The product of its (nonzero) digits is 1134, while the sum is 26.

The square root of 123139700 is about 11096.8328815027. The cubic root of 123139700 is about 497.5071924753.

The spelling of 123139700 in words is "one hundred twenty-three million, one hundred thirty-nine thousand, seven hundred".