7951881 has 8 divisors (see below), whose sum is σ = 12117184. Its totient is φ = 4543920.

The previous prime is 7951849. The next prime is 7951897. The reversal of 7951881 is 1881597.

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

It is not a de Polignac number, because 7951881 - 2⁵ = 7951849 is a prime.

It is a super-2 number, since 2×7951881² = 126464822876322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7951081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 189310 + ... + 189351.

It is an arithmetic number, because the mean of its divisors is an integer number (1514648).

Almost surely, 2^7951881 is an apocalyptic number.

It is an amenable number.

7951881 is a deficient number, since it is larger than the sum of its proper divisors (4165303).

7951881 is a wasteful number, since it uses less digits than its factorization.

7951881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378671.

The product of its digits is 20160, while the sum is 39.

The square root of 7951881 is about 2819.9079772220. The cubic root of 7951881 is about 199.5982016644.

The spelling of 7951881 in words is "seven million, nine hundred fifty-one thousand, eight hundred eighty-one".