7172639489 has 8 divisors (see below), whose sum is σ = 7250810280. Its totient is φ = 7094555136.

The previous prime is 7172639459. The next prime is 7172639543. The reversal of 7172639489 is 9849362717.

It can be written as a sum of positive squares in 4 ways, for example, as 4545051889 + 2627587600 = 67417^2 + 51260^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7172639489 is a prime.

It is a super-2 number, since 2×7172639489² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7172639459) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152867 + ... + 194199.

It is an arithmetic number, because the mean of its divisors is an integer number (906351285).

Almost surely, 2^7172639489 is an apocalyptic number.

It is an amenable number.

7172639489 is a deficient number, since it is larger than the sum of its proper divisors (78170791).

7172639489 is a wasteful number, since it uses less digits than its factorization.

7172639489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43219.

The product of its digits is 4572288, while the sum is 56.

The square root of 7172639489 is about 84691.4369284168. The cubic root of 7172639489 is about 1928.5297122669.

The spelling of 7172639489 in words is "seven billion, one hundred seventy-two million, six hundred thirty-nine thousand, four hundred eighty-nine".