7181148973 has 4 divisors (see below), whose sum is σ = 7182480060. Its totient is φ = 7179817888.

The previous prime is 7181148937. The next prime is 7181148991. The reversal of 7181148973 is 3798411817.

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 3533351364 + 3647797609 = 59442^2 + 60397^2 .

It is a cyclic number.

It is not a de Polignac number, because 7181148973 - 2¹⁷ = 7181017901 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7181148473) 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, 657418 + ... + 668251.

It is an arithmetic number, because the mean of its divisors is an integer number (1795620015).

Almost surely, 2^7181148973 is an apocalyptic number.

It is an amenable number.

7181148973 is a deficient number, since it is larger than the sum of its proper divisors (1331087).

7181148973 is a wasteful number, since it uses less digits than its factorization.

7181148973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1331086.

The product of its digits is 338688, while the sum is 49.

The square root of 7181148973 is about 84741.6601973315. The cubic root of 7181148973 is about 1929.2920679386.

The spelling of 7181148973 in words is "seven billion, one hundred eighty-one million, one hundred forty-eight thousand, nine hundred seventy-three".