90236485 has 4 divisors (see below), whose sum is σ = 108283788. Its totient is φ = 72189184.

The previous prime is 90236431. The next prime is 90236501. The reversal of 90236485 is 58463209.

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

It can be written as a sum of positive squares in 2 ways, for example, as 36566209 + 53670276 = 6047^2 + 7326^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90236485 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9023644 + ... + 9023653.

It is an arithmetic number, because the mean of its divisors is an integer number (27070947).

Almost surely, 2^90236485 is an apocalyptic number.

It is an amenable number.

90236485 is a deficient number, since it is larger than the sum of its proper divisors (18047303).

90236485 is a wasteful number, since it uses less digits than its factorization.

90236485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18047302.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 90236485 is about 9499.2886575785. The cubic root of 90236485 is about 448.5326443297.

The spelling of 90236485 in words is "ninety million, two hundred thirty-six thousand, four hundred eighty-five".