4090140861 has 4 divisors (see below), whose sum is σ = 5453521152. Its totient is φ = 2726760572.

The previous prime is 4090140841. The next prime is 4090140863. The reversal of 4090140861 is 1680410904.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4090140861 - 2⁶ = 4090140797 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4090140863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 681690141 + ... + 681690146.

It is an arithmetic number, because the mean of its divisors is an integer number (1363380288).

Almost surely, 2^4090140861 is an apocalyptic number.

It is an amenable number.

4090140861 is a deficient number, since it is larger than the sum of its proper divisors (1363380291).

4090140861 is a wasteful number, since it uses less digits than its factorization.

4090140861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1363380290.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 4090140861 is about 63954.2090952581. The cubic root of 4090140861 is about 1599.2367272181.

The spelling of 4090140861 in words is "four billion, ninety million, one hundred forty thousand, eight hundred sixty-one".