90439447 has 12 divisors (see below), whose sum is σ = 105370200. Its totient is φ = 77397936.

The previous prime is 90439423. The next prime is 90439451. The reversal of 90439447 is 74493409.

It is not a de Polignac number, because 90439447 - 2⁷ = 90439319 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 (90439417) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45429 + ... + 47377.

It is an arithmetic number, because the mean of its divisors is an integer number (8780850).

Almost surely, 2^90439447 is an apocalyptic number.

90439447 is a deficient number, since it is larger than the sum of its proper divisors (14930753).

90439447 is a wasteful number, since it uses less digits than its factorization.

90439447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2910 (or 2903 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 40.

The square root of 90439447 is about 9509.9656676562. The cubic root of 90439447 is about 448.8686758694.

The spelling of 90439447 in words is "ninety million, four hundred thirty-nine thousand, four hundred forty-seven".