9123220637 has 4 divisors (see below), whose sum is σ = 9217274556. Its totient is φ = 9029166720.

The previous prime is 9123220621. The next prime is 9123220649. The reversal of 9123220637 is 7360223219.

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 7264834756 + 1858385881 = 85234^2 + 43109^2 .

It is a cyclic number.

It is not a de Polignac number, because 9123220637 - 2⁴ = 9123220621 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9123220597 and 9123220606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9123220607) 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, 47026814 + ... + 47027007.

It is an arithmetic number, because the mean of its divisors is an integer number (2304318639).

Almost surely, 2^9123220637 is an apocalyptic number.

9123220637 is a gapful number since it is divisible by the number (97) formed by its first and last digit.

It is an amenable number.

9123220637 is a deficient number, since it is larger than the sum of its proper divisors (94053919).

9123220637 is an equidigital number, since it uses as much as digits as its factorization.

9123220637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94053918.

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 9123220637 is about 95515.5518070225. The cubic root of 9123220637 is about 2089.5337617531.

The spelling of 9123220637 in words is "nine billion, one hundred twenty-three million, two hundred twenty thousand, six hundred thirty-seven".