7967187121 has 4 divisors (see below), whose sum is σ = 7967798272. Its totient is φ = 7966575972.

The previous prime is 7967187119. The next prime is 7967187133. The reversal of 7967187121 is 1217817697.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7967187121 - 2¹ = 7967187119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7967187101) 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, 285585 + ... + 312238.

It is an arithmetic number, because the mean of its divisors is an integer number (1991949568).

Almost surely, 2^7967187121 is an apocalyptic number.

It is an amenable number.

7967187121 is a deficient number, since it is larger than the sum of its proper divisors (611151).

7967187121 is a wasteful number, since it uses less digits than its factorization.

7967187121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611150.

The product of its digits is 296352, while the sum is 49.

The square root of 7967187121 is about 89259.1010541782. The cubic root of 7967187121 is about 1997.2618463848.

The spelling of 7967187121 in words is "seven billion, nine hundred sixty-seven million, one hundred eighty-seven thousand, one hundred twenty-one".