1693681329 has 16 divisors (see below), whose sum is σ = 2274622272. Its totient is φ = 1120946688.

The previous prime is 1693681313. The next prime is 1693681333. The reversal of 1693681329 is 9231863961.

1693681329 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1693681329 - 2⁴ = 1693681313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1693681369) 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, 699529 + ... + 701945.

It is an arithmetic number, because the mean of its divisors is an integer number (142163892).

Almost surely, 2^1693681329 is an apocalyptic number.

It is an amenable number.

1693681329 is a deficient number, since it is larger than the sum of its proper divisors (580940943).

1693681329 is a wasteful number, since it uses less digits than its factorization.

1693681329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4016.

The product of its digits is 419904, while the sum is 48.

The square root of 1693681329 is about 41154.3597811945. The cubic root of 1693681329 is about 1192.0026840416.

The spelling of 1693681329 in words is "one billion, six hundred ninety-three million, six hundred eighty-one thousand, three hundred twenty-nine".