90238357609 has 3 divisors (see below), whose sum is σ = 90238658007. Its totient is φ = 90238057212.

The previous prime is 90238357571. The next prime is 90238357621. The reversal of 90238357609 is 90675383209.

The square root of 90238357609 is 300397.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 101505625 + 90136851984 = 10075^2 + 300228^2 .

It is not a de Polignac number, because 90238357609 - 2²⁵ = 90204803177 is a prime.

It is a super-2 number, since 2×90238357609² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90238357639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 150199 + ... + 450595.

It is an arithmetic number, because the mean of its divisors is an integer number (30079552669).

Almost surely, 2^90238357609 is an apocalyptic number.

90238357609 is the 300397-th square number.

90238357609 is the 150199-th centered octagonal number.

It is an amenable number.

90238357609 is a deficient number, since it is larger than the sum of its proper divisors (300398).

90238357609 is an frugal number, since it uses more digits than its factorization.

90238357609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600794 (or 300397 counting only the distinct ones).

The product of its (nonzero) digits is 2449440, while the sum is 52.

The spelling of 90238357609 in words is "ninety billion, two hundred thirty-eight million, three hundred fifty-seven thousand, six hundred nine".