83274773891 has 4 divisors (see below), whose sum is σ = 84517681032. Its totient is φ = 82031866752.

The previous prime is 83274773867. The next prime is 83274773909. The reversal of 83274773891 is 19837747238.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19837747238 = 2 ⋅9918873619.

It is a cyclic number.

It is not a de Polignac number, because 83274773891 - 2¹⁴ = 83274757507 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 83274773891.

It is not an unprimeable number, because it can be changed into a prime (83274773801) 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, 621453470 + ... + 621453603.

It is an arithmetic number, because the mean of its divisors is an integer number (21129420258).

Almost surely, 2^83274773891 is an apocalyptic number.

83274773891 is a deficient number, since it is larger than the sum of its proper divisors (1242907141).

83274773891 is a wasteful number, since it uses less digits than its factorization.

83274773891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1242907140.

The product of its digits is 14224896, while the sum is 59.

The spelling of 83274773891 in words is "eighty-three billion, two hundred seventy-four million, seven hundred seventy-three thousand, eight hundred ninety-one".