83249521 has 2 divisors, whose sum is σ = 83249522. Its totient is φ = 83249520.

The previous prime is 83249449. The next prime is 83249533. The reversal of 83249521 is 12594238.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81649296 + 1600225 = 9036^2 + 1265^2 .

It is a cyclic number.

It is not a de Polignac number, because 83249521 - 2¹¹ = 83247473 is a prime.

It is not a weakly prime, because it can be changed into another prime (83249921) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41624760 + 41624761.

It is an arithmetic number, because the mean of its divisors is an integer number (41624761).

Almost surely, 2^83249521 is an apocalyptic number.

It is an amenable number.

83249521 is a deficient number, since it is larger than the sum of its proper divisors (1).

83249521 is an equidigital number, since it uses as much as digits as its factorization.

83249521 is an evil number, because the sum of its binary digits is even.

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

The square root of 83249521 is about 9124.1175463713. The cubic root of 83249521 is about 436.6437496147.

The spelling of 83249521 in words is "eighty-three million, two hundred forty-nine thousand, five hundred twenty-one".