83749740479 has 4 divisors (see below), whose sum is σ = 83754839784. Its totient is φ = 83744641176.

The previous prime is 83749740323. The next prime is 83749740517. The reversal of 83749740479 is 97404794738.

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 83749740479 - 2⁸ = 83749740223 is a prime.

It is a super-2 number, since 2×83749740479² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83749140479) 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, 2524937 + ... + 2557890.

It is an arithmetic number, because the mean of its divisors is an integer number (20938709946).

Almost surely, 2^83749740479 is an apocalyptic number.

83749740479 is a deficient number, since it is larger than the sum of its proper divisors (5099305).

83749740479 is a wasteful number, since it uses less digits than its factorization.

83749740479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5099304.

The product of its (nonzero) digits is 42674688, while the sum is 62.

The spelling of 83749740479 in words is "eighty-three billion, seven hundred forty-nine million, seven hundred forty thousand, four hundred seventy-nine".