83921140749 has 4 divisors (see below), whose sum is σ = 111894854336. Its totient is φ = 55947427164.

The previous prime is 83921140729. The next prime is 83921140799. The reversal of 83921140749 is 94704112938.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 83921140749 - 2⁸ = 83921140493 is a prime.

It is a super-2 number, since 2×83921140749² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 83921140698 and 83921140707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83921140729) 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, 13986856789 + ... + 13986856794.

It is an arithmetic number, because the mean of its divisors is an integer number (27973713584).

Almost surely, 2^83921140749 is an apocalyptic number.

It is an amenable number.

83921140749 is a deficient number, since it is larger than the sum of its proper divisors (27973713587).

83921140749 is a wasteful number, since it uses less digits than its factorization.

83921140749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27973713586.

The product of its (nonzero) digits is 435456, while the sum is 48.

The spelling of 83921140749 in words is "eighty-three billion, nine hundred twenty-one million, one hundred forty thousand, seven hundred forty-nine".