90669361 has 4 divisors (see below), whose sum is σ = 91501300. Its totient is φ = 89837424.

The previous prime is 90669353. The next prime is 90669367. The reversal of 90669361 is 16396609.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 74218225 + 16451136 = 8615^2 + 4056^2 .

It is a cyclic number.

It is not a de Polignac number, because 90669361 - 2³ = 90669353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90669367) 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, 415806 + ... + 416023.

It is an arithmetic number, because the mean of its divisors is an integer number (22875325).

Almost surely, 2^90669361 is an apocalyptic number.

It is an amenable number.

90669361 is a deficient number, since it is larger than the sum of its proper divisors (831939).

90669361 is a wasteful number, since it uses less digits than its factorization.

90669361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 831938.

The product of its (nonzero) digits is 52488, while the sum is 40.

The square root of 90669361 is about 9522.0460511384. The cubic root of 90669361 is about 449.2487233938.

The spelling of 90669361 in words is "ninety million, six hundred sixty-nine thousand, three hundred sixty-one".