90651243 has 4 divisors (see below), whose sum is σ = 120868328. Its totient is φ = 60434160.

The previous prime is 90651241. The next prime is 90651269. The reversal of 90651243 is 34215609.

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

It is not a de Polignac number, because 90651243 - 2¹ = 90651241 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 90651243.

It is not an unprimeable number, because it can be changed into a prime (90651241) 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, 15108538 + ... + 15108543.

It is an arithmetic number, because the mean of its divisors is an integer number (30217082).

Almost surely, 2^90651243 is an apocalyptic number.

90651243 is a deficient number, since it is larger than the sum of its proper divisors (30217085).

90651243 is a wasteful number, since it uses less digits than its factorization.

90651243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30217084.

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

The square root of 90651243 is about 9521.0946324464. The cubic root of 90651243 is about 449.2187977000.

The spelling of 90651243 in words is "ninety million, six hundred fifty-one thousand, two hundred forty-three".