3960751891 has 4 divisors (see below), whose sum is σ = 3961386784. Its totient is φ = 3960117000.

The previous prime is 3960751877. The next prime is 3960751903. The reversal of 3960751891 is 1981570693.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1981570693 = 281 ⋅7051853.

It is a cyclic number.

It is not a de Polignac number, because 3960751891 - 2¹⁹ = 3960227603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3960751841) 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, 307995 + ... + 320596.

It is an arithmetic number, because the mean of its divisors is an integer number (990346696).

Almost surely, 2^3960751891 is an apocalyptic number.

3960751891 is a deficient number, since it is larger than the sum of its proper divisors (634893).

3960751891 is an equidigital number, since it uses as much as digits as its factorization.

3960751891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 634892.

The product of its (nonzero) digits is 408240, while the sum is 49.

The square root of 3960751891 is about 62934.5047728192. The cubic root of 3960751891 is about 1582.1921037301.

The spelling of 3960751891 in words is "three billion, nine hundred sixty million, seven hundred fifty-one thousand, eight hundred ninety-one".