90435481 has 8 divisors (see below), whose sum is σ = 92131560. Its totient is φ = 88754688.

The previous prime is 90435479. The next prime is 90435503. The reversal of 90435481 is 18453409.

It can be written as a sum of positive squares in 4 ways, for example, as 16475481 + 73960000 = 4059^2 + 8600^2 .

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 90435481 - 2¹ = 90435479 is a prime.

It is a super-2 number, since 2×90435481² = 16357152447402722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90435451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8485 + ... + 15901.

It is an arithmetic number, because the mean of its divisors is an integer number (11516445).

Almost surely, 2^90435481 is an apocalyptic number.

It is an amenable number.

90435481 is a deficient number, since it is larger than the sum of its proper divisors (1696079).

90435481 is a wasteful number, since it uses less digits than its factorization.

90435481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7643.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 90435481 is about 9509.7571472672. The cubic root of 90435481 is about 448.8621144288.

The spelling of 90435481 in words is "ninety million, four hundred thirty-five thousand, four hundred eighty-one".