3940715691 has 96 divisors (see below), whose sum is σ = 6999982080. Its totient is φ = 2188749600.

The previous prime is 3940715689. The next prime is 3940715707. The reversal of 3940715691 is 1965170493.

3940715691 is a `hidden beast` number, since 3 + 9 + 407 + 156 + 91 = 666.

It is not a de Polignac number, because 3940715691 - 2¹ = 3940715689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3940715641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1573146 + ... + 1575648.

It is an arithmetic number, because the mean of its divisors is an integer number (72916480).

Almost surely, 2^3940715691 is an apocalyptic number.

3940715691 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

3940715691 is a deficient number, since it is larger than the sum of its proper divisors (3059266389).

3940715691 is a wasteful number, since it uses less digits than its factorization.

3940715691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2579 (or 2567 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 45.

The square root of 3940715691 is about 62775.1199998853. The cubic root of 3940715691 is about 1579.5196546284.

The spelling of 3940715691 in words is "three billion, nine hundred forty million, seven hundred fifteen thousand, six hundred ninety-one".