1143660685 has 4 divisors (see below), whose sum is σ = 1372392828. Its totient is φ = 914928544.

The previous prime is 1143660677. The next prime is 1143660701. The reversal of 1143660685 is 5860663411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5860663411 = 19 ⋅308455969.

It can be written as a sum of positive squares in 2 ways, for example, as 669205161 + 474455524 = 25869^2 + 21782^2 .

It is a cyclic number.

It is not a de Polignac number, because 1143660685 - 2³ = 1143660677 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114366064 + ... + 114366073.

It is an arithmetic number, because the mean of its divisors is an integer number (343098207).

Almost surely, 2^1143660685 is an apocalyptic number.

It is an amenable number.

1143660685 is a deficient number, since it is larger than the sum of its proper divisors (228732143).

1143660685 is an equidigital number, since it uses as much as digits as its factorization.

1143660685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228732142.

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 1143660685 is about 33818.0526494356. The cubic root of 1143660685 is about 1045.7608936068.

The spelling of 1143660685 in words is "one billion, one hundred forty-three million, six hundred sixty thousand, six hundred eighty-five".