90381529 has 8 divisors (see below), whose sum is σ = 105401600. Its totient is φ = 77469588.

The previous prime is 90381527. The next prime is 90381539. The reversal of 90381529 is 92518309.

It is not a de Polignac number, because 90381529 - 2¹ = 90381527 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90381521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131409 + ... + 132094.

It is an arithmetic number, because the mean of its divisors is an integer number (13175200).

Almost surely, 2^90381529 is an apocalyptic number.

It is an amenable number.

90381529 is a deficient number, since it is larger than the sum of its proper divisors (15020071).

90381529 is an equidigital number, since it uses as much as digits as its factorization.

90381529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263524 (or 263510 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 90381529 is about 9506.9200585679. The cubic root of 90381529 is about 448.7728359512.

The spelling of 90381529 in words is "ninety million, three hundred eighty-one thousand, five hundred twenty-nine".