90664529 has 4 divisors (see below), whose sum is σ = 91165620. Its totient is φ = 90163440.

The previous prime is 90664493. The next prime is 90664531. The reversal of 90664529 is 92546609.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 92546609 = 7829 ⋅11821.

It can be written as a sum of positive squares in 2 ways, for example, as 27541504 + 63123025 = 5248^2 + 7945^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90664529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90664579) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 250274 + ... + 250635.

It is an arithmetic number, because the mean of its divisors is an integer number (22791405).

Almost surely, 2^90664529 is an apocalyptic number.

It is an amenable number.

90664529 is a deficient number, since it is larger than the sum of its proper divisors (501091).

90664529 is a wasteful number, since it uses less digits than its factorization.

90664529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501090.

The product of its (nonzero) digits is 116640, while the sum is 41.

The square root of 90664529 is about 9521.7923207766. The cubic root of 90664529 is about 449.2407427177.

The spelling of 90664529 in words is "ninety million, six hundred sixty-four thousand, five hundred twenty-nine".