193861493 has 12 divisors (see below), whose sum is σ = 227142720. Its totient is φ = 164965752.

The previous prime is 193861471. The next prime is 193861513. The reversal of 193861493 is 394168391.

It is not a de Polignac number, because 193861493 - 2¹⁶ = 193795957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (193860493) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7421 + ... + 21042.

It is an arithmetic number, because the mean of its divisors is an integer number (18928560).

Almost surely, 2^193861493 is an apocalyptic number.

It is an amenable number.

193861493 is a deficient number, since it is larger than the sum of its proper divisors (33281227).

193861493 is a wasteful number, since it uses less digits than its factorization.

193861493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28616 (or 28609 counting only the distinct ones).

The product of its digits is 139968, while the sum is 44.

The square root of 193861493 is about 13923.4152778691. The cubic root of 193861493 is about 578.7582361016.

The spelling of 193861493 in words is "one hundred ninety-three million, eight hundred sixty-one thousand, four hundred ninety-three".