7147172939 has 4 divisors (see below), whose sum is σ = 7150718424. Its totient is φ = 7143627456.

The previous prime is 7147172933. The next prime is 7147172947. The reversal of 7147172939 is 9392717417.

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

It is a cyclic number.

It is not a de Polignac number, because 7147172939 - 2¹² = 7147168843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7147172933) 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 3 ways as a sum of consecutive naturals, for example, 1769717 + ... + 1773750.

It is an arithmetic number, because the mean of its divisors is an integer number (1787679606).

Almost surely, 2^7147172939 is an apocalyptic number.

7147172939 is a deficient number, since it is larger than the sum of its proper divisors (3545485).

7147172939 is a wasteful number, since it uses less digits than its factorization.

7147172939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3545484.

The product of its digits is 666792, while the sum is 50.

The square root of 7147172939 is about 84540.9542115536. The cubic root of 7147172939 is about 1926.2445823743.

The spelling of 7147172939 in words is "seven billion, one hundred forty-seven million, one hundred seventy-two thousand, nine hundred thirty-nine".