7971955 has 8 divisors (see below), whose sum is σ = 9896400. Its totient is φ = 6157536.

The previous prime is 7971919. The next prime is 7971959. The reversal of 7971955 is 5591797.

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

It is a cyclic number.

It is not a de Polignac number, because 7971955 - 2⁹ = 7971443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7971959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27345 + ... + 27634.

It is an arithmetic number, because the mean of its divisors is an integer number (1237050).

Almost surely, 2^7971955 is an apocalyptic number.

7971955 is a deficient number, since it is larger than the sum of its proper divisors (1924445).

7971955 is a wasteful number, since it uses less digits than its factorization.

7971955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55013.

The product of its digits is 99225, while the sum is 43.

The square root of 7971955 is about 2823.4650697326. The cubic root of 7971955 is about 199.7660180356.

The spelling of 7971955 in words is "seven million, nine hundred seventy-one thousand, nine hundred fifty-five".