83959476479 has 4 divisors (see below), whose sum is σ = 86667846720. Its totient is φ = 81251106240.

The previous prime is 83959476451. The next prime is 83959476487. The reversal of 83959476479 is 97467495938.

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 83959476479 - 2¹² = 83959472383 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 (83959476499) 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, 1354185074 + ... + 1354185135.

It is an arithmetic number, because the mean of its divisors is an integer number (21666961680).

Almost surely, 2^83959476479 is an apocalyptic number.

83959476479 is a deficient number, since it is larger than the sum of its proper divisors (2708370241).

83959476479 is a wasteful number, since it uses less digits than its factorization.

83959476479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2708370240.

The product of its digits is 411505920, while the sum is 71.

The spelling of 83959476479 in words is "eighty-three billion, nine hundred fifty-nine million, four hundred seventy-six thousand, four hundred seventy-nine".