7891961 has 16 divisors (see below), whose sum is σ = 10419840. Its totient is φ = 5786880.

The previous prime is 7891951. The next prime is 7891969. The reversal of 7891961 is 1691987.

It is a happy number.

It is not a de Polignac number, because 7891961 - 2²² = 3697657 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7891969) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1706 + ... + 4323.

It is an arithmetic number, because the mean of its divisors is an integer number (651240).

Almost surely, 2^7891961 is an apocalyptic number.

It is an amenable number.

7891961 is a deficient number, since it is larger than the sum of its proper divisors (2527879).

7891961 is a wasteful number, since it uses less digits than its factorization.

7891961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6064.

The product of its digits is 27216, while the sum is 41.

The square root of 7891961 is about 2809.2634265942. The cubic root of 7891961 is about 199.0955913900.

The spelling of 7891961 in words is "seven million, eight hundred ninety-one thousand, nine hundred sixty-one".