2686193693 has 2 divisors, whose sum is σ = 2686193694. Its totient is φ = 2686193692.

The previous prime is 2686193689. The next prime is 2686193729. The reversal of 2686193693 is 3963916862.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2364098884 + 322094809 = 48622^2 + 17947^2 .

It is a cyclic number.

It is not a de Polignac number, because 2686193693 - 2² = 2686193689 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2686193603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1343096846 + 1343096847.

It is an arithmetic number, because the mean of its divisors is an integer number (1343096847).

Almost surely, 2^2686193693 is an apocalyptic number.

2686193693 is the 27704-th centered heptagonal number.

It is an amenable number.

2686193693 is a deficient number, since it is larger than the sum of its proper divisors (1).

2686193693 is an equidigital number, since it uses as much as digits as its factorization.

2686193693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2519424, while the sum is 53.

The square root of 2686193693 is about 51828.5027084518. The cubic root of 2686193693 is about 1390.0991411784.

The spelling of 2686193693 in words is "two billion, six hundred eighty-six million, one hundred ninety-three thousand, six hundred ninety-three".