90438541 has 4 divisors (see below), whose sum is σ = 90577692. Its totient is φ = 90299392.

The previous prime is 90438529. The next prime is 90438587. The reversal of 90438541 is 14583409.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9060100 + 81378441 = 3010^2 + 9021^2 .

It is a cyclic number.

It is not a de Polignac number, because 90438541 - 2¹⁵ = 90405773 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 90438497 and 90438506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90438041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68596 + ... + 69901.

It is an arithmetic number, because the mean of its divisors is an integer number (22644423).

Almost surely, 2^90438541 is an apocalyptic number.

It is an amenable number.

90438541 is a deficient number, since it is larger than the sum of its proper divisors (139151).

90438541 is a wasteful number, since it uses less digits than its factorization.

90438541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139150.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 90438541 is about 9509.9180332956. The cubic root of 90438541 is about 448.8671769793.

The spelling of 90438541 in words is "ninety million, four hundred thirty-eight thousand, five hundred forty-one".