83212849729 has 4 divisors (see below), whose sum is σ = 83213709700. Its totient is φ = 83211989760.

The previous prime is 83212849667. The next prime is 83212849739. The reversal of 83212849729 is 92794821238.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 63568024129 + 19644825600 = 252127^2 + 140160^2 .

It is a cyclic number.

It is not a de Polignac number, because 83212849729 - 2³³ = 74622915137 is a prime.

It is a super-2 number, since 2×83212849729² (a number of 23 digits) contains 22 as substring.

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 83212849729.

It is not an unprimeable number, because it can be changed into a prime (83212849739) 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, 263304 + ... + 485545.

It is an arithmetic number, because the mean of its divisors is an integer number (20803427425).

Almost surely, 2^83212849729 is an apocalyptic number.

It is an amenable number.

83212849729 is a deficient number, since it is larger than the sum of its proper divisors (859971).

83212849729 is a wasteful number, since it uses less digits than its factorization.

83212849729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 859970.

The product of its digits is 3483648, while the sum is 55.

The spelling of 83212849729 in words is "eighty-three billion, two hundred twelve million, eight hundred forty-nine thousand, seven hundred twenty-nine".