83671280999 has 4 divisors (see below), whose sum is σ = 83729834760. Its totient is φ = 83612727240.

The previous prime is 83671280993. The next prime is 83671281047. The reversal of 83671280999 is 99908217638.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99908217638 = 2 ⋅49954108819.

It is a cyclic number.

It is not a de Polignac number, because 83671280999 - 2⁴ = 83671280983 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 (83671280993) 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, 29274737 + ... + 29277594.

It is an arithmetic number, because the mean of its divisors is an integer number (20932458690).

Almost surely, 2^83671280999 is an apocalyptic number.

83671280999 is a deficient number, since it is larger than the sum of its proper divisors (58553761).

83671280999 is a wasteful number, since it uses less digits than its factorization.

83671280999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58553760.

The product of its (nonzero) digits is 11757312, while the sum is 62.

The spelling of 83671280999 in words is "eighty-three billion, six hundred seventy-one million, two hundred eighty thousand, nine hundred ninety-nine".