9990237 has 8 divisors (see below), whose sum is σ = 14103936. Its totient is φ = 6268352.

The previous prime is 9990221. The next prime is 9990251. The reversal of 9990237 is 7320999.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9990237 - 2⁴ = 9990221 is a prime.

It is a d-powerful number, because it can be written as 9 + 9³ + 9⁴ + 0 + 2²³ + 3¹³ + 7 .

It is a junction number, because it is equal to n+sod(n) for n = 9990195 and 9990204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9990137) 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 7 ways as a sum of consecutive naturals, for example, 97893 + ... + 97994.

It is an arithmetic number, because the mean of its divisors is an integer number (1762992).

Almost surely, 2^9990237 is an apocalyptic number.

It is an amenable number.

9990237 is a deficient number, since it is larger than the sum of its proper divisors (4113699).

9990237 is a wasteful number, since it uses less digits than its factorization.

9990237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195907.

The product of its (nonzero) digits is 30618, while the sum is 39.

The square root of 9990237 is about 3160.7336173743. The cubic root of 9990237 is about 215.3733336876.

The spelling of 9990237 in words is "nine million, nine hundred ninety thousand, two hundred thirty-seven".