7167457921 has 4 divisors (see below), whose sum is σ = 7718800852. Its totient is φ = 6616114992.

The previous prime is 7167457901. The next prime is 7167457931. The reversal of 7167457921 is 1297547617.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 720170896 + 6447287025 = 26836^2 + 80295^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7167457921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7167457901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 275671446 + ... + 275671471.

It is an arithmetic number, because the mean of its divisors is an integer number (1929700213).

Almost surely, 2^7167457921 is an apocalyptic number.

It is an amenable number.

7167457921 is a deficient number, since it is larger than the sum of its proper divisors (551342931).

7167457921 is a wasteful number, since it uses less digits than its factorization.

7167457921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551342930.

The product of its digits is 740880, while the sum is 49.

The square root of 7167457921 is about 84660.8405403584. The cubic root of 7167457921 is about 1928.0652056689.

The spelling of 7167457921 in words is "seven billion, one hundred sixty-seven million, four hundred fifty-seven thousand, nine hundred twenty-one".