90405527 has 4 divisors (see below), whose sum is σ = 90498480. Its totient is φ = 90312576.

The previous prime is 90405521. The next prime is 90405529. The reversal of 90405527 is 72550409.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72550409 = 1091 ⋅66499.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90405527 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 90405493 and 90405502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90405521) 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, 45002 + ... + 46967.

It is an arithmetic number, because the mean of its divisors is an integer number (22624620).

Almost surely, 2^90405527 is an apocalyptic number.

90405527 is a deficient number, since it is larger than the sum of its proper divisors (92953).

90405527 is an equidigital number, since it uses as much as digits as its factorization.

90405527 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92952.

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 90405527 is about 9508.1821080583. The cubic root of 90405527 is about 448.8125516527.

The spelling of 90405527 in words is "ninety million, four hundred five thousand, five hundred twenty-seven".