90706569 has 16 divisors (see below), whose sum is σ = 124630272. Its totient is φ = 58650368.

The previous prime is 90706529. The next prime is 90706591. The reversal of 90706569 is 96560709.

It is a cyclic number.

It is not a de Polignac number, because 90706569 - 2⁸ = 90706313 is a prime.

It is a super-2 number, since 2×90706569² = 16455363319503522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 90706569.

It is not an unprimeable number, because it can be changed into a prime (90706529) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13087 + ... + 18779.

It is an arithmetic number, because the mean of its divisors is an integer number (7789392).

Almost surely, 2^90706569 is an apocalyptic number.

It is an amenable number.

90706569 is a deficient number, since it is larger than the sum of its proper divisors (33923703).

90706569 is a wasteful number, since it uses less digits than its factorization.

90706569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5856.

The product of its (nonzero) digits is 102060, while the sum is 42.

The square root of 90706569 is about 9523.9996325073. Note that the first 3 decimals coincide. The cubic root of 90706569 is about 449.3101677461.

The spelling of 90706569 in words is "ninety million, seven hundred six thousand, five hundred sixty-nine".