171920916 has 72 divisors (see below), whose sum is σ = 452501504. Its totient is φ = 54976320.

The previous prime is 171920909. The next prime is 171920927. The reversal of 171920916 is 619029171.

171920916 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 141126 + ... + 142338.

Almost surely, 2^171920916 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 171920916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (226250752).

171920916 is an abundant number, since it is smaller than the sum of its proper divisors (280580588).

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

171920916 is a wasteful number, since it uses less digits than its factorization.

171920916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1381 (or 1376 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 36.

The square root of 171920916 is about 13111.8616527174. The cubic root of 171920916 is about 556.0445291528.

The spelling of 171920916 in words is "one hundred seventy-one million, nine hundred twenty thousand, nine hundred sixteen".