90209027 has 4 divisors (see below), whose sum is σ = 92128416. Its totient is φ = 88289640.

The previous prime is 90209023. The next prime is 90209029. The reversal of 90209027 is 72090209.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72090209 = 4271 ⋅16879.

It is a cyclic number.

It is not a de Polignac number, because 90209027 - 2² = 90209023 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90209023) 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, 959624 + ... + 959717.

It is an arithmetic number, because the mean of its divisors is an integer number (23032104).

Almost surely, 2^90209027 is an apocalyptic number.

90209027 is a deficient number, since it is larger than the sum of its proper divisors (1919389).

90209027 is a wasteful number, since it uses less digits than its factorization.

90209027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1919388.

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 90209027 is about 9497.8432815034. The cubic root of 90209027 is about 448.4871451478.

The spelling of 90209027 in words is "ninety million, two hundred nine thousand, twenty-seven".