193995557 has 6 divisors (see below), whose sum is σ = 225668358. Its totient is φ = 166281864.

The previous prime is 193995523. The next prime is 193995569. The reversal of 193995557 is 755599391.

It can be written as a sum of positive squares in only one way, i.e., 138627076 + 55368481 = 11774^2 + 7441^2 .

It is not a de Polignac number, because 193995557 - 2⁶ = 193995493 is a prime.

It is a super-2 number, since 2×193995557² = 75268552271480498, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 193995499 and 193995508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (193995157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1979498 + ... + 1979595.

It is an arithmetic number, because the mean of its divisors is an integer number (37611393).

Almost surely, 2^193995557 is an apocalyptic number.

It is an amenable number.

193995557 is a deficient number, since it is larger than the sum of its proper divisors (31672801).

193995557 is an equidigital number, since it uses as much as digits as its factorization.

193995557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3959107 (or 3959100 counting only the distinct ones).

The product of its digits is 1913625, while the sum is 53.

The square root of 193995557 is about 13928.2287818660. The cubic root of 193995557 is about 578.8916178682.

The spelling of 193995557 in words is "one hundred ninety-three million, nine hundred ninety-five thousand, five hundred fifty-seven".