1143927685 has 4 divisors (see below), whose sum is σ = 1372713228. Its totient is φ = 915142144.

The previous prime is 1143927553. The next prime is 1143927709. The reversal of 1143927685 is 5867293411.

It is a Cunningham number, because it is equal to 33822²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 411846436 + 732081249 = 20294^2 + 27057^2 .

It is a cyclic number.

It is not a de Polignac number, because 1143927685 - 2¹⁷ = 1143796613 is a prime.

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, 114392764 + ... + 114392773.

It is an arithmetic number, because the mean of its divisors is an integer number (343178307).

Almost surely, 2^1143927685 is an apocalyptic number.

It is an amenable number.

1143927685 is a deficient number, since it is larger than the sum of its proper divisors (228785543).

1143927685 is an equidigital number, since it uses as much as digits as its factorization.

1143927685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228785542.

The product of its digits is 362880, while the sum is 46.

The square root of 1143927685 is about 33822.0000147833. Note that the first 4 decimals coincide. The cubic root of 1143927685 is about 1045.8422686848.

The spelling of 1143927685 in words is "one billion, one hundred forty-three million, nine hundred twenty-seven thousand, six hundred eighty-five".