83354121391 has 4 divisors (see below), whose sum is σ = 85387148784. Its totient is φ = 81321094000.

The previous prime is 83354121373. The next prime is 83354121397. The reversal of 83354121391 is 19312145338.

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-83354121391 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 (83354121397) 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, 1016513635 + ... + 1016513716.

It is an arithmetic number, because the mean of its divisors is an integer number (21346787196).

Almost surely, 2^83354121391 is an apocalyptic number.

83354121391 is a deficient number, since it is larger than the sum of its proper divisors (2033027393).

83354121391 is a wasteful number, since it uses less digits than its factorization.

83354121391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2033027392.

The product of its digits is 77760, while the sum is 40.

The spelling of 83354121391 in words is "eighty-three billion, three hundred fifty-four million, one hundred twenty-one thousand, three hundred ninety-one".