193921916 has 12 divisors (see below), whose sum is σ = 347255832. Its totient is φ = 94705968.

The previous prime is 193921913. The next prime is 193921933. The reversal of 193921916 is 619129391.

It is a super-2 number, since 2×193921916² = 75211419010222112, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (193921913) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 563555 + ... + 563898.

It is an arithmetic number, because the mean of its divisors is an integer number (28937986).

Almost surely, 2^193921916 is an apocalyptic number.

It is an amenable number.

193921916 is a deficient number, since it is larger than the sum of its proper divisors (153333916).

193921916 is a wasteful number, since it uses less digits than its factorization.

193921916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1127500 (or 1127498 counting only the distinct ones).

The product of its digits is 26244, while the sum is 41.

The square root of 193921916 is about 13925.5849428309. The cubic root of 193921916 is about 578.8183592267.

The spelling of 193921916 in words is "one hundred ninety-three million, nine hundred twenty-one thousand, nine hundred sixteen".