3986742461 has 8 divisors (see below), whose sum is σ = 4398132984. Its totient is φ = 3590311680.

The previous prime is 3986742443. The next prime is 3986742493. The reversal of 3986742461 is 1642476893.

It can be written as a sum of positive squares in 4 ways, for example, as 1976836 + 3984765625 = 1406^2 + 63125^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3986742461 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3986747461) 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 7 ways as a sum of consecutive naturals, for example, 3739376 + ... + 3740441.

It is an arithmetic number, because the mean of its divisors is an integer number (549766623).

Almost surely, 2^3986742461 is an apocalyptic number.

It is an amenable number.

3986742461 is a deficient number, since it is larger than the sum of its proper divisors (411390523).

3986742461 is a wasteful number, since it uses less digits than its factorization.

3986742461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7479871.

The product of its digits is 1741824, while the sum is 50.

The square root of 3986742461 is about 63140.6561654217. The cubic root of 3986742461 is about 1585.6453582428.

It can be divided in two parts, 39867 and 42461, that added together give a palindrome (82328).

The spelling of 3986742461 in words is "three billion, nine hundred eighty-six million, seven hundred forty-two thousand, four hundred sixty-one".