90215077 has 4 divisors (see below), whose sum is σ = 91357120. Its totient is φ = 89073036.

The previous prime is 90215057. The next prime is 90215089. The reversal of 90215077 is 77051209.

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 90215077 - 2¹⁹ = 89690789 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 (90215057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 570903 + ... + 571060.

It is an arithmetic number, because the mean of its divisors is an integer number (22839280).

Almost surely, 2^90215077 is an apocalyptic number.

It is an amenable number.

90215077 is a deficient number, since it is larger than the sum of its proper divisors (1142043).

90215077 is a wasteful number, since it uses less digits than its factorization.

90215077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1142042.

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

The square root of 90215077 is about 9498.1617695215. The cubic root of 90215077 is about 448.4971710719.

The spelling of 90215077 in words is "ninety million, two hundred fifteen thousand, seventy-seven".