90388271 has 4 divisors (see below), whose sum is σ = 90413352. Its totient is φ = 90363192.

The previous prime is 90388253. The next prime is 90388307. The reversal of 90388271 is 17288309.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17288309 = 19 ⋅909911.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90388271 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90388211) 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, 5996 + ... + 14721.

It is an arithmetic number, because the mean of its divisors is an integer number (22603338).

Almost surely, 2^90388271 is an apocalyptic number.

90388271 is a deficient number, since it is larger than the sum of its proper divisors (25081).

90388271 is a wasteful number, since it uses less digits than its factorization.

90388271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25080.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 90388271 is about 9507.2746357723. The cubic root of 90388271 is about 448.7839943935.

Adding to 90388271 its sum of digits (38), we get a palindrome (90388309).

The spelling of 90388271 in words is "ninety million, three hundred eighty-eight thousand, two hundred seventy-one".