90148291 has 4 divisors (see below), whose sum is σ = 90701512. Its totient is φ = 89595072.

The previous prime is 90148259. The next prime is 90148307. The reversal of 90148291 is 19284109.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19284109 = 13 ⋅1483393.

It is a cyclic number.

It is not a de Polignac number, because 90148291 - 2⁵ = 90148259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90148241) 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, 276366 + ... + 276691.

It is an arithmetic number, because the mean of its divisors is an integer number (22675378).

Almost surely, 2^90148291 is an apocalyptic number.

90148291 is a deficient number, since it is larger than the sum of its proper divisors (553221).

90148291 is a wasteful number, since it uses less digits than its factorization.

90148291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553220.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 90148291 is about 9494.6453856898. The cubic root of 90148291 is about 448.3864699653.

The spelling of 90148291 in words is "ninety million, one hundred forty-eight thousand, two hundred ninety-one".