193934091 has 24 divisors (see below), whose sum is σ = 292190976. Its totient is φ = 114148320.

The previous prime is 193934087. The next prime is 193934099. The reversal of 193934091 is 190439391.

It is not a de Polignac number, because 193934091 - 2² = 193934087 is a prime.

It is a super-2 number, since 2×193934091² = 75220863303992562, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (193934099) 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, 3346 + ... + 19976.

It is an arithmetic number, because the mean of its divisors is an integer number (12174624).

Almost surely, 2^193934091 is an apocalyptic number.

193934091 is a deficient number, since it is larger than the sum of its proper divisors (98256885).

193934091 is a wasteful number, since it uses less digits than its factorization.

193934091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16683 (or 16670 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 39.

The square root of 193934091 is about 13926.0220809821. The cubic root of 193934091 is about 578.8304722912.

The spelling of 193934091 in words is "one hundred ninety-three million, nine hundred thirty-four thousand, ninety-one".