90520649 has 4 divisors (see below), whose sum is σ = 91666560. Its totient is φ = 89374740.

The previous prime is 90520627. The next prime is 90520711. The reversal of 90520649 is 94602509.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 90520649 - 2¹² = 90516553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90520349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 572837 + ... + 572994.

It is an arithmetic number, because the mean of its divisors is an integer number (22916640).

Almost surely, 2^90520649 is an apocalyptic number.

It is an amenable number.

90520649 is a deficient number, since it is larger than the sum of its proper divisors (1145911).

90520649 is a wasteful number, since it uses less digits than its factorization.

90520649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1145910.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 90520649 is about 9514.2340206661. The cubic root of 90520649 is about 449.0029761560.

The spelling of 90520649 in words is "ninety million, five hundred twenty thousand, six hundred forty-nine".