1693143681 has 16 divisors (see below), whose sum is σ = 2278165824. Its totient is φ = 1118472704.

The previous prime is 1693143659. The next prime is 1693143701. The reversal of 1693143681 is 1863413961.

It is a cyclic number.

It is not a de Polignac number, because 1693143681 - 2⁵ = 1693143649 is a prime.

It is a super-2 number, since 2×1693143681² = 5733471049020459522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1693143631) 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, 240250 + ... + 247196.

It is an arithmetic number, because the mean of its divisors is an integer number (142385364).

Almost surely, 2^1693143681 is an apocalyptic number.

It is an amenable number.

1693143681 is a deficient number, since it is larger than the sum of its proper divisors (585022143).

1693143681 is a wasteful number, since it uses less digits than its factorization.

1693143681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7680.

The product of its digits is 93312, while the sum is 42.

The square root of 1693143681 is about 41147.8271722821. The cubic root of 1693143681 is about 1191.8765395550.

The spelling of 1693143681 in words is "one billion, six hundred ninety-three million, one hundred forty-three thousand, six hundred eighty-one".