193738081 has 6 divisors (see below), whose sum is σ = 194418770. Its totient is φ = 193059696.

The previous prime is 193738057. The next prime is 193738093. The reversal of 193738081 is 180837391.

It can be written as a sum of positive squares in only one way, i.e., 192654400 + 1083681 = 13880^2 + 1041^2 .

It is not a de Polignac number, because 193738081 - 2¹⁷ = 193607009 is a prime.

It is a super-2 number, since 2×193738081² = 75068888059125122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (193738381) 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 5 ways as a sum of consecutive naturals, for example, 119605 + ... + 121213.

Almost surely, 2^193738081 is an apocalyptic number.

It is an amenable number.

193738081 is a deficient number, since it is larger than the sum of its proper divisors (680689).

193738081 is an frugal number, since it uses more digits than its factorization.

193738081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2303 (or 1956 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 193738081 is about 13918.9827573713. The cubic root of 193738081 is about 578.6353977594.

The spelling of 193738081 in words is "one hundred ninety-three million, seven hundred thirty-eight thousand, eighty-one".