90786071 has 4 divisors (see below), whose sum is σ = 91247112. Its totient is φ = 90325032.

The previous prime is 90786061. The next prime is 90786119. The reversal of 90786071 is 17068709.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 90786071 - 2¹⁰ = 90785047 is a prime.

It is a super-2 number, since 2×90786071² = 16484221375234082, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90786041) 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, 230225 + ... + 230618.

It is an arithmetic number, because the mean of its divisors is an integer number (22811778).

Almost surely, 2^90786071 is an apocalyptic number.

90786071 is a deficient number, since it is larger than the sum of its proper divisors (461041).

90786071 is a wasteful number, since it uses less digits than its factorization.

90786071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461040.

The product of its (nonzero) digits is 21168, while the sum is 38.

The square root of 90786071 is about 9528.1724900424. The cubic root of 90786071 is about 449.4413990568.

The spelling of 90786071 in words is "ninety million, seven hundred eighty-six thousand, seventy-one".