193681964 has 24 divisors (see below), whose sum is σ = 389211648. Its totient is φ = 82610640.

The previous prime is 193681963. The next prime is 193681993. The reversal of 193681964 is 469186391.

193681964 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (193681963) 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, 10484 + ... + 22299.

It is an arithmetic number, because the mean of its divisors is an integer number (16217152).

Almost surely, 2^193681964 is an apocalyptic number.

193681964 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

193681964 is an abundant number, since it is smaller than the sum of its proper divisors (195529684).

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

193681964 is a wasteful number, since it uses less digits than its factorization.

193681964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33005 (or 33003 counting only the distinct ones).

The product of its digits is 279936, while the sum is 47.

The square root of 193681964 is about 13916.9667672234. The cubic root of 193681964 is about 578.5795243553.

The spelling of 193681964 in words is "one hundred ninety-three million, six hundred eighty-one thousand, nine hundred sixty-four".