7971122905 has 8 divisors (see below), whose sum is σ = 9566270784. Its totient is φ = 6376282800.

The previous prime is 7971122899. The next prime is 7971122921. The reversal of 7971122905 is 5092211797.

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

It is not a de Polignac number, because 7971122905 - 2⁷ = 7971122777 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15501 + ... + 127210.

It is an arithmetic number, because the mean of its divisors is an integer number (1195783848).

Almost surely, 2^7971122905 is an apocalyptic number.

It is an amenable number.

7971122905 is a deficient number, since it is larger than the sum of its proper divisors (1595147879).

7971122905 is a wasteful number, since it uses less digits than its factorization.

7971122905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153887.

The product of its (nonzero) digits is 79380, while the sum is 43.

The square root of 7971122905 is about 89281.1452939533. The cubic root of 7971122905 is about 1997.5906741566.

The spelling of 7971122905 in words is "seven billion, nine hundred seventy-one million, one hundred twenty-two thousand, nine hundred five".