193040639 has 4 divisors (see below), whose sum is σ = 210589800. Its totient is φ = 175491480.

The previous prime is 193040629. The next prime is 193040641. The reversal of 193040639 is 936040391.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 193040639 - 2⁸ = 193040383 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 193040599 and 193040608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (193040629) 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, 8774564 + ... + 8774585.

It is an arithmetic number, because the mean of its divisors is an integer number (52647450).

Almost surely, 2^193040639 is an apocalyptic number.

193040639 is a deficient number, since it is larger than the sum of its proper divisors (17549161).

193040639 is a wasteful number, since it uses less digits than its factorization.

193040639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17549160.

The product of its (nonzero) digits is 17496, while the sum is 35.

The square root of 193040639 is about 13893.9065420781. The cubic root of 193040639 is about 577.9402154374.

The spelling of 193040639 in words is "one hundred ninety-three million, forty thousand, six hundred thirty-nine".