90381535 has 4 divisors (see below), whose sum is σ = 108457848. Its totient is φ = 72305224.

The previous prime is 90381527. The next prime is 90381539. The reversal of 90381535 is 53518309.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 90381535 - 2³ = 90381527 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 90381535.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90381539) 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, 9038149 + ... + 9038158.

It is an arithmetic number, because the mean of its divisors is an integer number (27114462).

Almost surely, 2^90381535 is an apocalyptic number.

90381535 is a deficient number, since it is larger than the sum of its proper divisors (18076313).

90381535 is a wasteful number, since it uses less digits than its factorization.

90381535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18076312.

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

The square root of 90381535 is about 9506.9203741275. The cubic root of 90381535 is about 448.7728458818.

The spelling of 90381535 in words is "ninety million, three hundred eighty-one thousand, five hundred thirty-five".