83525621 has 2 divisors, whose sum is σ = 83525622. Its totient is φ = 83525620.

The previous prime is 83525609. The next prime is 83525623. The reversal of 83525621 is 12652538.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82555396 + 970225 = 9086^2 + 985^2 .

It is a cyclic number.

It is not a de Polignac number, because 83525621 - 2⁶ = 83525557 is a prime.

Together with 83525623, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83525623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41762810 + 41762811.

It is an arithmetic number, because the mean of its divisors is an integer number (41762811).

Almost surely, 2^83525621 is an apocalyptic number.

It is an amenable number.

83525621 is a deficient number, since it is larger than the sum of its proper divisors (1).

83525621 is an equidigital number, since it uses as much as digits as its factorization.

83525621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14400, while the sum is 32.

The square root of 83525621 is about 9139.2352524705. The cubic root of 83525621 is about 437.1259317954.

The spelling of 83525621 in words is "eighty-three million, five hundred twenty-five thousand, six hundred twenty-one".