90439441 has 4 divisors (see below), whose sum is σ = 90636084. Its totient is φ = 90242800.

The previous prime is 90439423. The next prime is 90439451. The reversal of 90439441 is 14493409.

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 36857041 + 53582400 = 6071^2 + 7320^2 .

It is a cyclic number.

It is not a de Polignac number, because 90439441 - 2¹⁹ = 89915153 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 90439397 and 90439406.

It is not an unprimeable number, because it can be changed into a prime (90439451) 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, 97630 + ... + 98551.

It is an arithmetic number, because the mean of its divisors is an integer number (22659021).

Almost surely, 2^90439441 is an apocalyptic number.

It is an amenable number.

90439441 is a deficient number, since it is larger than the sum of its proper divisors (196643).

90439441 is a wasteful number, since it uses less digits than its factorization.

90439441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196642.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 90439441 is about 9509.9653521977. The cubic root of 90439441 is about 448.8686659431.

The spelling of 90439441 in words is "ninety million, four hundred thirty-nine thousand, four hundred forty-one".