90231469 has 4 divisors (see below), whose sum is σ = 90405180. Its totient is φ = 90057760.

The previous prime is 90231467. The next prime is 90231487. The reversal of 90231469 is 96413209.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96413209 = 919 ⋅104911.

It can be written as a sum of positive squares in 2 ways, for example, as 35545444 + 54686025 = 5962^2 + 7395^2 .

It is a cyclic number.

It is not a de Polignac number, because 90231469 - 2¹ = 90231467 is a prime.

It is a super-2 number, since 2×90231469² = 16283435995795922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90231467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86074 + ... + 87115.

It is an arithmetic number, because the mean of its divisors is an integer number (22601295).

Almost surely, 2^90231469 is an apocalyptic number.

It is an amenable number.

90231469 is a deficient number, since it is larger than the sum of its proper divisors (173711).

90231469 is a wasteful number, since it uses less digits than its factorization.

90231469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173710.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 90231469 is about 9499.0246341401. The cubic root of 90231469 is about 448.5243332738.

The spelling of 90231469 in words is "ninety million, two hundred thirty-one thousand, four hundred sixty-nine".