90453865 has 4 divisors (see below), whose sum is σ = 108544644. Its totient is φ = 72363088.

The previous prime is 90453827. The next prime is 90453907. The reversal of 90453865 is 56835409.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56835409 = 137 ⋅414857.

It can be written as a sum of positive squares in 2 ways, for example, as 17539344 + 72914521 = 4188^2 + 8539^2 .

It is a cyclic number.

It is not a de Polignac number, because 90453865 - 2¹¹ = 90451817 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian 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, 9045382 + ... + 9045391.

It is an arithmetic number, because the mean of its divisors is an integer number (27136161).

Almost surely, 2^90453865 is an apocalyptic number.

It is an amenable number.

90453865 is a deficient number, since it is larger than the sum of its proper divisors (18090779).

90453865 is a wasteful number, since it uses less digits than its factorization.

90453865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18090778.

The product of its (nonzero) digits is 129600, while the sum is 40.

The square root of 90453865 is about 9510.7236843471. The cubic root of 90453865 is about 448.8925277206.

The spelling of 90453865 in words is "ninety million, four hundred fifty-three thousand, eight hundred sixty-five".