83529169921 has 4 divisors (see below), whose sum is σ = 85786715092. Its totient is φ = 81271624752.

The previous prime is 83529169891. The next prime is 83529169951. The reversal of 83529169921 is 12996192538.

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

It is an interprime number because it is at equal distance from previous prime (83529169891) and next prime (83529169951).

It can be written as a sum of positive squares in 2 ways, for example, as 46672849521 + 36856320400 = 216039^2 + 191980^2 .

It is a cyclic number.

It is not a de Polignac number, because 83529169921 - 2¹⁷ = 83529038849 is a prime.

It is a super-2 number, since 2×83529169921² (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 (83529169951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1128772530 + ... + 1128772603.

It is an arithmetic number, because the mean of its divisors is an integer number (21446678773).

Almost surely, 2^83529169921 is an apocalyptic number.

It is an amenable number.

83529169921 is a deficient number, since it is larger than the sum of its proper divisors (2257545171).

83529169921 is a wasteful number, since it uses less digits than its factorization.

83529169921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2257545170.

The product of its digits is 2099520, while the sum is 55.

The spelling of 83529169921 in words is "eighty-three billion, five hundred twenty-nine million, one hundred sixty-nine thousand, nine hundred twenty-one".