1693047081 has 16 divisors (see below), whose sum is σ = 2472929280. Its totient is φ = 1021791120.

The previous prime is 1693047077. The next prime is 1693047133. The reversal of 1693047081 is 1807403961.

It is not a de Polignac number, because 1693047081 - 2² = 1693047077 is a prime.

It is a super-2 number, since 2×1693047081² = 5732816836965241122, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1693047001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99445 + ... + 115218.

It is an arithmetic number, because the mean of its divisors is an integer number (154558080).

Almost surely, 2^1693047081 is an apocalyptic number.

1693047081 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1693047081 is a deficient number, since it is larger than the sum of its proper divisors (779882199).

1693047081 is a wasteful number, since it uses less digits than its factorization.

1693047081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214916.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 1693047081 is about 41146.6533390019. The cubic root of 1693047081 is about 1191.8538721612.

The spelling of 1693047081 in words is "one billion, six hundred ninety-three million, forty-seven thousand, eighty-one".