90238969 has 4 divisors (see below), whose sum is σ = 91252980. Its totient is φ = 89224960.

The previous prime is 90238963. The next prime is 90238997. The reversal of 90238969 is 96983209.

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 32661225 + 57577744 = 5715^2 + 7588^2 .

It is a cyclic number.

It is not a de Polignac number, because 90238969 - 2⁹ = 90238457 is a prime.

It is a super-2 number, since 2×90238969² = 16286143052365922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90238963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 506872 + ... + 507049.

It is an arithmetic number, because the mean of its divisors is an integer number (22813245).

Almost surely, 2^90238969 is an apocalyptic number.

It is an amenable number.

90238969 is a deficient number, since it is larger than the sum of its proper divisors (1014011).

90238969 is a wasteful number, since it uses less digits than its factorization.

90238969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1014010.

The product of its (nonzero) digits is 209952, while the sum is 46.

The square root of 90238969 is about 9499.4194033109. The cubic root of 90238969 is about 448.5367599779.

The spelling of 90238969 in words is "ninety million, two hundred thirty-eight thousand, nine hundred sixty-nine".