161949000 has 128 divisors (see below), whose sum is σ = 519292800. Its totient is φ = 41990400.

The previous prime is 161948993. The next prime is 161949031. The reversal of 161949000 is 949161.

161949000 is digitally balanced in base 3, 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 (30).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 110271 + ... + 111729.

It is an arithmetic number, because the mean of its divisors is an integer number (4056975).

Almost surely, 2^161949000 is an apocalyptic number.

161949000 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 161949000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (259646400).

161949000 is an abundant number, since it is smaller than the sum of its proper divisors (357343800).

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

161949000 is a wasteful number, since it uses less digits than its factorization.

161949000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1520 (or 1506 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 161949000 is about 12725.9184344392. The cubic root of 161949000 is about 545.0789661972.

The spelling of 161949000 in words is "one hundred sixty-one million, nine hundred forty-nine thousand".