90785429 has 8 divisors (see below), whose sum is σ = 104921280. Its totient is φ = 76941216.

The previous prime is 90785419. The next prime is 90785459. The reversal of 90785429 is 92458709.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 90785429 - 2²⁴ = 74008213 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 90785429.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90785419) 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 7 ways as a sum of consecutive naturals, for example, 72239 + ... + 73484.

It is an arithmetic number, because the mean of its divisors is an integer number (13115160).

Almost surely, 2^90785429 is an apocalyptic number.

It is an amenable number.

90785429 is a deficient number, since it is larger than the sum of its proper divisors (14135851).

90785429 is a wasteful number, since it uses less digits than its factorization.

90785429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145819.

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 90785429 is about 9528.1388004164. The cubic root of 90785429 is about 449.4403396357.

The spelling of 90785429 in words is "ninety million, seven hundred eighty-five thousand, four hundred twenty-nine".