90529657 has 2 divisors, whose sum is σ = 90529658. Its totient is φ = 90529656.

The previous prime is 90529609. The next prime is 90529667. The reversal of 90529657 is 75692509.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89567296 + 962361 = 9464^2 + 981^2 .

It is an emirp because it is prime and its reverse (75692509) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90529657 is a prime.

It is not a weakly prime, because it can be changed into another prime (90529667) 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 as a sum of consecutive naturals, namely, 45264828 + 45264829.

It is an arithmetic number, because the mean of its divisors is an integer number (45264829).

Almost surely, 2^90529657 is an apocalyptic number.

It is an amenable number.

90529657 is a deficient number, since it is larger than the sum of its proper divisors (1).

90529657 is an equidigital number, since it uses as much as digits as its factorization.

90529657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 170100, while the sum is 43.

The square root of 90529657 is about 9514.7074048549. The cubic root of 90529657 is about 449.0178695705.

The spelling of 90529657 in words is "ninety million, five hundred twenty-nine thousand, six hundred fifty-seven".