90284851469 has 4 divisors (see below), whose sum is σ = 90569662044. Its totient is φ = 90000040896.

The previous prime is 90284851457. The next prime is 90284851507. The reversal of 90284851469 is 96415848209.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96415848209 = 29 ⋅3324684421.

It can be written as a sum of positive squares in 2 ways, for example, as 49300873444 + 40983978025 = 222038^2 + 202445^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90284851469 is a prime.

It is a super-2 number, since 2×90284851469² (a number of 23 digits) 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 (90284851169) 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, 142404812 + ... + 142405445.

It is an arithmetic number, because the mean of its divisors is an integer number (22642415511).

Almost surely, 2^90284851469 is an apocalyptic number.

It is an amenable number.

90284851469 is a deficient number, since it is larger than the sum of its proper divisors (284810575).

90284851469 is a wasteful number, since it uses less digits than its factorization.

90284851469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284810574.

The product of its (nonzero) digits is 4976640, while the sum is 56.

The spelling of 90284851469 in words is "ninety billion, two hundred eighty-four million, eight hundred fifty-one thousand, four hundred sixty-nine".