90619565 has 8 divisors (see below), whose sum is σ = 109474200. Its totient is φ = 72008512.

The previous prime is 90619561. The next prime is 90619567. The reversal of 90619565 is 56591609.

It can be written as a sum of positive squares in 4 ways, for example, as 5924356 + 84695209 = 2434^2 + 9203^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 90619565 - 2² = 90619561 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90619561) 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 7 ways as a sum of consecutive naturals, for example, 60074 + ... + 61563.

It is an arithmetic number, because the mean of its divisors is an integer number (13684275).

Almost surely, 2^90619565 is an apocalyptic number.

It is an amenable number.

90619565 is a deficient number, since it is larger than the sum of its proper divisors (18854635).

90619565 is a wasteful number, since it uses less digits than its factorization.

90619565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121791.

The product of its (nonzero) digits is 72900, while the sum is 41.

The square root of 90619565 is about 9519.4309178648. The cubic root of 90619565 is about 449.1664652277.

The spelling of 90619565 in words is "ninety million, six hundred nineteen thousand, five hundred sixty-five".