90532091 has 4 divisors (see below), whose sum is σ = 97496112. Its totient is φ = 83568072.

The previous prime is 90532069. The next prime is 90532129. The reversal of 90532091 is 19023509.

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 90532091 - 2¹⁴ = 90515707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90532061) 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, 3481991 + ... + 3482016.

It is an arithmetic number, because the mean of its divisors is an integer number (24374028).

Almost surely, 2^90532091 is an apocalyptic number.

90532091 is a deficient number, since it is larger than the sum of its proper divisors (6964021).

90532091 is a wasteful number, since it uses less digits than its factorization.

90532091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6964020.

The product of its (nonzero) digits is 2430, while the sum is 29.

The square root of 90532091 is about 9514.8353112390. The cubic root of 90532091 is about 449.0218936651.

The spelling of 90532091 in words is "ninety million, five hundred thirty-two thousand, ninety-one".