84392115971 has 4 divisors (see below), whose sum is σ = 85775593344. Its totient is φ = 83008638600.

The previous prime is 84392115953. The next prime is 84392115991. The reversal of 84392115971 is 17951129348.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84392115971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84392115901) 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, 691738595 + ... + 691738716.

It is an arithmetic number, because the mean of its divisors is an integer number (21443898336).

Almost surely, 2^84392115971 is an apocalyptic number.

84392115971 is a deficient number, since it is larger than the sum of its proper divisors (1383477373).

84392115971 is a wasteful number, since it uses less digits than its factorization.

84392115971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1383477372.

The product of its digits is 544320, while the sum is 50.

The spelling of 84392115971 in words is "eighty-four billion, three hundred ninety-two million, one hundred fifteen thousand, nine hundred seventy-one".