113171904 has 168 divisors, whose sum is σ = 355031040. Its totient is φ = 35645184.

The previous prime is 113171887. The next prime is 113171909. The reversal of 113171904 is 409171311.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113171909) 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, 295297 + ... + 295679.

It is an arithmetic number, because the mean of its divisors is an integer number (2113280).

Almost surely, 2^113171904 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 113171904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (177515520).

113171904 is an abundant number, since it is smaller than the sum of its proper divisors (241859136).

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

113171904 is an equidigital number, since it uses as much as digits as its factorization.

113171904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429 (or 407 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 27.

The square root of 113171904 is about 10638.2284239435. The cubic root of 113171904 is about 483.7038463268.

The spelling of 113171904 in words is "one hundred thirteen million, one hundred seventy-one thousand, nine hundred four".