90465545 has 4 divisors (see below), whose sum is σ = 108558660. Its totient is φ = 72372432.

The previous prime is 90465539. The next prime is 90465547. The reversal of 90465545 is 54556409.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54556409 = 2861 ⋅19069.

It can be written as a sum of positive squares in 2 ways, for example, as 17397241 + 73068304 = 4171^2 + 8548^2 .

It is a cyclic number.

It is not a de Polignac number, because 90465545 - 2²⁰ = 89416969 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 90465499 and 90465508.

It is not an unprimeable number, because it can be changed into a prime (90465547) 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, 9046550 + ... + 9046559.

It is an arithmetic number, because the mean of its divisors is an integer number (27139665).

Almost surely, 2^90465545 is an apocalyptic number.

It is an amenable number.

90465545 is a deficient number, since it is larger than the sum of its proper divisors (18093115).

90465545 is a wasteful number, since it uses less digits than its factorization.

90465545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18093114.

The product of its (nonzero) digits is 108000, while the sum is 38.

The square root of 90465545 is about 9511.3377082301. The cubic root of 90465545 is about 448.9118482109.

The spelling of 90465545 in words is "ninety million, four hundred sixty-five thousand, five hundred forty-five".