83851938329 has 4 divisors (see below), whose sum is σ = 84277582884. Its totient is φ = 83426293776.

The previous prime is 83851938259. The next prime is 83851938343. The reversal of 83851938329 is 92383915838.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 75451849225 + 8400089104 = 274685^2 + 91652^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83851938329 is a prime.

It is a super-2 number, since 2×83851938329² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83851938349) 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, 212821982 + ... + 212822375.

It is an arithmetic number, because the mean of its divisors is an integer number (21069395721).

Almost surely, 2^83851938329 is an apocalyptic number.

It is an amenable number.

83851938329 is a deficient number, since it is larger than the sum of its proper divisors (425644555).

83851938329 is a wasteful number, since it uses less digits than its factorization.

83851938329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425644554.

The product of its digits is 11197440, while the sum is 59.

The spelling of 83851938329 in words is "eighty-three billion, eight hundred fifty-one million, nine hundred thirty-eight thousand, three hundred twenty-nine".