90535381 has 4 divisors (see below), whose sum is σ = 90571264. Its totient is φ = 90499500.

The previous prime is 90535363. The next prime is 90535439. The reversal of 90535381 is 18353509.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18353509 = 3407 ⋅5387.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90535381 is a prime.

It is a super-2 number, since 2×90535381² = 16393310425630322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90535331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13845 + ... + 19306.

It is an arithmetic number, because the mean of its divisors is an integer number (22642816).

Almost surely, 2^90535381 is an apocalyptic number.

It is an amenable number.

90535381 is a deficient number, since it is larger than the sum of its proper divisors (35883).

90535381 is a wasteful number, since it uses less digits than its factorization.

90535381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35882.

The product of its (nonzero) digits is 16200, while the sum is 34.

The square root of 90535381 is about 9515.0081975792. The cubic root of 90535381 is about 449.0273328566.

The spelling of 90535381 in words is "ninety million, five hundred thirty-five thousand, three hundred eighty-one".