8042397905 has 8 divisors (see below), whose sum is σ = 9651360552. Its totient is φ = 6433596288.

The previous prime is 8042397851. The next prime is 8042397931. The reversal of 8042397905 is 5097932408.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1351812289 + 6690585616 = 36767^2 + 81796^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 8042397905 - 2⁶ = 8042397841 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8042397905.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162107 + ... + 205823.

It is an arithmetic number, because the mean of its divisors is an integer number (1206420069).

Almost surely, 2^8042397905 is an apocalyptic number.

It is an amenable number.

8042397905 is a deficient number, since it is larger than the sum of its proper divisors (1608962647).

8042397905 is a wasteful number, since it uses less digits than its factorization.

8042397905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80515.

The product of its (nonzero) digits is 544320, while the sum is 47.

The square root of 8042397905 is about 89679.4173988658. The cubic root of 8042397905 is about 2003.5269354571.

The spelling of 8042397905 in words is "eight billion, forty-two million, three hundred ninety-seven thousand, nine hundred five".