84277975391 has 4 divisors (see below), whose sum is σ = 84280219992. Its totient is φ = 84275730792.

The previous prime is 84277975351. The next prime is 84277975393. The reversal of 84277975391 is 19357977248.

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

It is a cyclic number.

It is not a de Polignac number, because 84277975391 - 2²⁶ = 84210866527 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 (84277975393) 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, 1065005 + ... + 1141398.

It is an arithmetic number, because the mean of its divisors is an integer number (21070054998).

Almost surely, 2^84277975391 is an apocalyptic number.

84277975391 is a deficient number, since it is larger than the sum of its proper divisors (2244601).

84277975391 is a wasteful number, since it uses less digits than its factorization.

84277975391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2244600.

The product of its digits is 26671680, while the sum is 62.

The spelling of 84277975391 in words is "eighty-four billion, two hundred seventy-seven million, nine hundred seventy-five thousand, three hundred ninety-one".