90561069 has 6 divisors (see below), whose sum is σ = 130810446. Its totient is φ = 60374040.

The previous prime is 90561041. The next prime is 90561071. The reversal of 90561069 is 96016509.

90561069 is a `hidden beast` number, since 90 + 561 + 0 + 6 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 83997225 + 6563844 = 9165^2 + 2562^2 .

It is not a de Polignac number, because 90561069 - 2⁹ = 90560557 is a prime.

It is a super-2 number, since 2×90561069² = 16402614436845522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90561469) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5031162 + ... + 5031179.

It is an arithmetic number, because the mean of its divisors is an integer number (21801741).

Almost surely, 2^90561069 is an apocalyptic number.

It is an amenable number.

90561069 is a deficient number, since it is larger than the sum of its proper divisors (40249377).

90561069 is a wasteful number, since it uses less digits than its factorization.

90561069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10062347 (or 10062344 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 36.

The square root of 90561069 is about 9516.3579693074. The cubic root of 90561069 is about 449.0697970043.

The spelling of 90561069 in words is "ninety million, five hundred sixty-one thousand, sixty-nine".