90440063 has 4 divisors (see below), whose sum is σ = 103360080. Its totient is φ = 77520048.

The previous prime is 90440047. The next prime is 90440081. The reversal of 90440063 is 36004409.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36004409 = 7 ⋅5143487.

It is a cyclic number.

It is not a de Polignac number, because 90440063 - 2⁴ = 90440047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90440033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6459998 + ... + 6460011.

It is an arithmetic number, because the mean of its divisors is an integer number (25840020).

Almost surely, 2^90440063 is an apocalyptic number.

90440063 is a deficient number, since it is larger than the sum of its proper divisors (12920017).

90440063 is a wasteful number, since it uses less digits than its factorization.

90440063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12920016.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 90440063 is about 9509.9980546791. The cubic root of 90440063 is about 448.8696949766.

The spelling of 90440063 in words is "ninety million, four hundred forty thousand, sixty-three".