90212063 has 4 divisors (see below), whose sum is σ = 90520248. Its totient is φ = 89903880.

The previous prime is 90212041. The next prime is 90212071. The reversal of 90212063 is 36021209.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36021209 = 7 ⋅5145887.

It is a cyclic number.

It is not a de Polignac number, because 90212063 - 2¹⁰ = 90211039 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 (90242063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153653 + ... + 154238.

It is an arithmetic number, because the mean of its divisors is an integer number (22630062).

Almost surely, 2^90212063 is an apocalyptic number.

90212063 is a deficient number, since it is larger than the sum of its proper divisors (308185).

90212063 is a wasteful number, since it uses less digits than its factorization.

90212063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308184.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 90212063 is about 9498.0031059165. The cubic root of 90212063 is about 448.4921763948.

It can be divided in two parts, 9021206 and 3, that added together give a palindrome (9021209).

The spelling of 90212063 in words is "ninety million, two hundred twelve thousand, sixty-three".