90521077 has 4 divisors (see below), whose sum is σ = 94456800. Its totient is φ = 86585356.

The previous prime is 90521051. The next prime is 90521083. The reversal of 90521077 is 77012509.

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 90521077 - 2¹¹ = 90519029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90521777) 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 in 3 ways as a sum of consecutive naturals, for example, 1967827 + ... + 1967872.

It is an arithmetic number, because the mean of its divisors is an integer number (23614200).

Almost surely, 2^90521077 is an apocalyptic number.

It is an amenable number.

90521077 is a deficient number, since it is larger than the sum of its proper divisors (3935723).

90521077 is a wasteful number, since it uses less digits than its factorization.

90521077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3935722.

The product of its (nonzero) digits is 4410, while the sum is 31.

The square root of 90521077 is about 9514.2565132542. The cubic root of 90521077 is about 449.0036838139.

The spelling of 90521077 in words is "ninety million, five hundred twenty-one thousand, seventy-seven".