161708700 has 72 divisors (see below), whose sum is σ = 472785712. Its totient is φ = 42670080.

The previous prime is 161708693. The next prime is 161708707. The reversal of 161708700 is 7807161.

It is an interprime number because it is at equal distance from previous prime (161708693) and next prime (161708707).

It is a super-2 number, since 2×161708700² = 52299407311380000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161708707) 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, 26322 + ... + 31878.

Almost surely, 2^161708700 is an apocalyptic number.

161708700 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 161708700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (236392856).

161708700 is an abundant number, since it is smaller than the sum of its proper divisors (311077012).

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

161708700 is a wasteful number, since it uses less digits than its factorization.

161708700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5671 (or 5664 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 30.

The square root of 161708700 is about 12716.4735677781. The cubic root of 161708700 is about 544.8092366054.

The spelling of 161708700 in words is "one hundred sixty-one million, seven hundred eight thousand, seven hundred".