90470439 has 20 divisors (see below), whose sum is σ = 138804424. Its totient is φ = 58681584.

The previous prime is 90470407. The next prime is 90470453. The reversal of 90470439 is 93407409.

It is not a de Polignac number, because 90470439 - 2⁵ = 90470407 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 (90471439) 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 19 ways as a sum of consecutive naturals, for example, 12097 + ... + 18090.

Almost surely, 2^90470439 is an apocalyptic number.

90470439 is a deficient number, since it is larger than the sum of its proper divisors (48333985).

90470439 is a wasteful number, since it uses less digits than its factorization.

90470439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30236 (or 30227 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 90470439 is about 9511.5949766588. The cubic root of 90470439 is about 448.9199431343.

It can be divided in two parts, 90470 and 439, that added together give a palindrome (90909).

The spelling of 90470439 in words is "ninety million, four hundred seventy thousand, four hundred thirty-nine".