7187172149 has 4 divisors (see below), whose sum is σ = 7285626636. Its totient is φ = 7088717664.

The previous prime is 7187172137. The next prime is 7187172151. The reversal of 7187172149 is 9412717817.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9412717817 = 2137 ⋅4404641.

It can be written as a sum of positive squares in 2 ways, for example, as 1511809924 + 5675362225 = 38882^2 + 75335^2 .

It is a cyclic number.

It is not a de Polignac number, because 7187172149 - 2²⁰ = 7186123573 is a prime.

It is a super-2 number, since 2×7187172149² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7187172049) 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, 49227134 + ... + 49227279.

It is an arithmetic number, because the mean of its divisors is an integer number (1821406659).

Almost surely, 2^7187172149 is an apocalyptic number.

It is an amenable number.

7187172149 is a deficient number, since it is larger than the sum of its proper divisors (98454487).

7187172149 is an equidigital number, since it uses as much as digits as its factorization.

7187172149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98454486.

The product of its digits is 197568, while the sum is 47.

The square root of 7187172149 is about 84777.1912073053. The cubic root of 7187172149 is about 1929.8313139727.

The spelling of 7187172149 in words is "seven billion, one hundred eighty-seven million, one hundred seventy-two thousand, one hundred forty-nine".