191964 has 24 divisors (see below), whose sum is σ = 474768. Its totient is φ = 60160.

The previous prime is 191953. The next prime is 191969. The reversal of 191964 is 469191.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191969) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 267 + ... + 674.

It is an arithmetic number, because the mean of its divisors is an integer number (19782).

2¹⁹¹⁹⁶⁴ is an apocalyptic number.

It is an amenable number.

191964 is an abundant number, since it is smaller than the sum of its proper divisors (282804).

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

191964 is a wasteful number, since it uses less digits than its factorization.

191964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 965 (or 963 counting only the distinct ones).

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

The square root of 191964 is about 438.1369648866. The cubic root of 191964 is about 57.6863769630.

The spelling of 191964 in words is "one hundred ninety-one thousand, nine hundred sixty-four".