4000939651 has 4 divisors (see below), whose sum is σ = 4011496600. Its totient is φ = 3990382704.

The previous prime is 4000939627. The next prime is 4000939693. The reversal of 4000939651 is 1569390004.

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

It is a cyclic number.

It is not a de Polignac number, because 4000939651 - 2⁵ = 4000939619 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4000939651.

It is not an unprimeable number, because it can be changed into a prime (4000939451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5277906 + ... + 5278663.

It is an arithmetic number, because the mean of its divisors is an integer number (1002874150).

Almost surely, 2^4000939651 is an apocalyptic number.

4000939651 is a deficient number, since it is larger than the sum of its proper divisors (10556949).

4000939651 is a wasteful number, since it uses less digits than its factorization.

4000939651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10556948.

The product of its (nonzero) digits is 29160, while the sum is 37.

The square root of 4000939651 is about 63252.9813605651. The cubic root of 4000939651 is about 1587.5253424851.

The spelling of 4000939651 in words is "four billion, nine hundred thirty-nine thousand, six hundred fifty-one".