83521429 has 4 divisors (see below), whose sum is σ = 83619520. Its totient is φ = 83423340.

The previous prime is 83521381. The next prime is 83521433. The reversal of 83521429 is 92412538.

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 a cyclic number.

It is not a de Polignac number, because 83521429 - 2⁹ = 83520917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 83521394 and 83521403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83521129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47757 + ... + 49474.

It is an arithmetic number, because the mean of its divisors is an integer number (20904880).

Almost surely, 2^83521429 is an apocalyptic number.

It is an amenable number.

83521429 is a deficient number, since it is larger than the sum of its proper divisors (98091).

83521429 is an equidigital number, since it uses as much as digits as its factorization.

83521429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98090.

The product of its digits is 17280, while the sum is 34.

The square root of 83521429 is about 9139.0059087408. The cubic root of 83521429 is about 437.1186188195.

The spelling of 83521429 in words is "eighty-three million, five hundred twenty-one thousand, four hundred twenty-nine".