193939493 has 16 divisors (see below), whose sum is σ = 214885440. Its totient is φ = 173568000.

The previous prime is 193939489. The next prime is 193939507. The reversal of 193939493 is 394939391.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 193939493 - 2² = 193939489 is a prime.

It is a super-2 number, since 2×193939493² = 75225053890194098, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (193939423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 251813 + ... + 252581.

It is an arithmetic number, because the mean of its divisors is an integer number (13430340).

Almost surely, 2^193939493 is an apocalyptic number.

It is an amenable number.

193939493 is a deficient number, since it is larger than the sum of its proper divisors (20945947).

193939493 is a wasteful number, since it uses less digits than its factorization.

193939493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1108.

The product of its digits is 708588, while the sum is 50.

The square root of 193939493 is about 13926.2160330795. The cubic root of 193939493 is about 578.8358466483.

The spelling of 193939493 in words is "one hundred ninety-three million, nine hundred thirty-nine thousand, four hundred ninety-three".