83853521 has 2 divisors, whose sum is σ = 83853522. Its totient is φ = 83853520.

The previous prime is 83853509. The next prime is 83853527. The reversal of 83853521 is 12535838.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81993025 + 1860496 = 9055^2 + 1364^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83853521 is a prime.

It is not a weakly prime, because it can be changed into another prime (83853527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41926760 + 41926761.

It is an arithmetic number, because the mean of its divisors is an integer number (41926761).

Almost surely, 2^83853521 is an apocalyptic number.

It is an amenable number.

83853521 is a deficient number, since it is larger than the sum of its proper divisors (1).

83853521 is an equidigital number, since it uses as much as digits as its factorization.

83853521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28800, while the sum is 35.

The square root of 83853521 is about 9157.1568185764. The cubic root of 83853521 is about 437.6971993728.

The spelling of 83853521 in words is "eighty-three million, eight hundred fifty-three thousand, five hundred twenty-one".