2687551693 has 2 divisors, whose sum is σ = 2687551694. Its totient is φ = 2687551692.

The previous prime is 2687551687. The next prime is 2687551739. The reversal of 2687551693 is 3961557862.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1348138089 + 1339413604 = 36717^2 + 36598^2 .

It is a cyclic number.

It is not a de Polignac number, because 2687551693 - 2¹⁷ = 2687420621 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2687551693.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2687551673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1343775846 + 1343775847.

It is an arithmetic number, because the mean of its divisors is an integer number (1343775847).

Almost surely, 2^2687551693 is an apocalyptic number.

It is an amenable number.

2687551693 is a deficient number, since it is larger than the sum of its proper divisors (1).

2687551693 is an equidigital number, since it uses as much as digits as its factorization.

2687551693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2721600, while the sum is 52.

The square root of 2687551693 is about 51841.6019524860. The cubic root of 2687551693 is about 1390.3333556868. Note that the first 4 decimals are identical.

The spelling of 2687551693 in words is "two billion, six hundred eighty-seven million, five hundred fifty-one thousand, six hundred ninety-three".