83525609 has 2 divisors, whose sum is σ = 83525610. Its totient is φ = 83525608.

The previous prime is 83525587. The next prime is 83525621. The reversal of 83525609 is 90652538.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57229225 + 26296384 = 7565^2 + 5128^2 .

It is a cyclic number.

It is not a de Polignac number, because 83525609 - 2⁸ = 83525353 is a prime.

It is not a weakly prime, because it can be changed into another prime (83528609) 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 as a sum of consecutive naturals, namely, 41762804 + 41762805.

It is an arithmetic number, because the mean of its divisors is an integer number (41762805).

Almost surely, 2^83525609 is an apocalyptic number.

It is an amenable number.

83525609 is a deficient number, since it is larger than the sum of its proper divisors (1).

83525609 is an equidigital number, since it uses as much as digits as its factorization.

83525609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64800, while the sum is 38.

The square root of 83525609 is about 9139.2345959604. The cubic root of 83525609 is about 437.1259108616.

The spelling of 83525609 in words is "eighty-three million, five hundred twenty-five thousand, six hundred nine".