90516243 has 4 divisors (see below), whose sum is σ = 120688328. Its totient is φ = 60344160.

The previous prime is 90516227. The next prime is 90516259. The reversal of 90516243 is 34261509.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34261509 = 3 ⋅11420503.

It is an interprime number because it is at equal distance from previous prime (90516227) and next prime (90516259).

It is not a de Polignac number, because 90516243 - 2⁴ = 90516227 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 90516243.

It is not an unprimeable number, because it can be changed into a prime (90516203) 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, 15086038 + ... + 15086043.

It is an arithmetic number, because the mean of its divisors is an integer number (30172082).

Almost surely, 2^90516243 is an apocalyptic number.

90516243 is a deficient number, since it is larger than the sum of its proper divisors (30172085).

90516243 is a wasteful number, since it uses less digits than its factorization.

90516243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30172084.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 90516243 is about 9514.0024700438. The cubic root of 90516243 is about 448.9956911176.

The spelling of 90516243 in words is "ninety million, five hundred sixteen thousand, two hundred forty-three".