193945642 has 16 divisors (see below), whose sum is σ = 317620800. Its totient is φ = 88086240.

The previous prime is 193945589. The next prime is 193945681. The reversal of 193945642 is 246549391.

It is a super-2 number, since 2×193945642² = 75229824101584328, which contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 32659 + ... + 38137.

It is an arithmetic number, because the mean of its divisors is an integer number (19851300).

Almost surely, 2^193945642 is an apocalyptic number.

193945642 is a deficient number, since it is larger than the sum of its proper divisors (123675158).

193945642 is a wasteful number, since it uses less digits than its factorization.

193945642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7101.

The product of its digits is 233280, while the sum is 43.

The square root of 193945642 is about 13926.4368019964. The cubic root of 193945642 is about 578.8419640614.

The spelling of 193945642 in words is "one hundred ninety-three million, nine hundred forty-five thousand, six hundred forty-two".