8419651973 has 4 divisors (see below), whose sum is σ = 8420046060. Its totient is φ = 8419257888.

The previous prime is 8419651969. The next prime is 8419651979. The reversal of 8419651973 is 3791569148.

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 7183918564 + 1235733409 = 84758^2 + 35153^2 .

It is a cyclic number.

It is not a de Polignac number, because 8419651973 - 2² = 8419651969 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8419651979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 163040 + ... + 208377.

It is an arithmetic number, because the mean of its divisors is an integer number (2105011515).

Almost surely, 2^8419651973 is an apocalyptic number.

It is an amenable number.

8419651973 is a deficient number, since it is larger than the sum of its proper divisors (394087).

8419651973 is a wasteful number, since it uses less digits than its factorization.

8419651973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394086.

The product of its digits is 1632960, while the sum is 53.

The square root of 8419651973 is about 91758.6615693581. The cubic root of 8419651973 is about 2034.3767324627.

The spelling of 8419651973 in words is "eight billion, four hundred nineteen million, six hundred fifty-one thousand, nine hundred seventy-three".