123197904 has 120 divisors (see below), whose sum is σ = 357477120. Its totient is φ = 39585024.

The previous prime is 123197903. The next prime is 123197909. The reversal of 123197904 is 409791321.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123197903) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 737629 + ... + 737795.

It is an arithmetic number, because the mean of its divisors is an integer number (2978976).

Almost surely, 2^123197904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123197904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (178738560).

123197904 is an abundant number, since it is smaller than the sum of its proper divisors (234279216).

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

123197904 is a wasteful number, since it uses less digits than its factorization.

123197904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337 (or 328 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 123197904 is about 11099.4551217616. The cubic root of 123197904 is about 497.5855651082.

The spelling of 123197904 in words is "one hundred twenty-three million, one hundred ninety-seven thousand, nine hundred four".