9940637 has 4 divisors (see below), whose sum is σ = 11360736. Its totient is φ = 8520540.

The previous prime is 9940613. The next prime is 9940643. The reversal of 9940637 is 7360499.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7360499 = 71 ⋅103669.

It is not a de Polignac number, because 9940637 - 2¹⁰ = 9939613 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9940637.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9940607) 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, 710039 + ... + 710052.

It is an arithmetic number, because the mean of its divisors is an integer number (2840184).

Almost surely, 2^9940637 is an apocalyptic number.

It is an amenable number.

9940637 is a deficient number, since it is larger than the sum of its proper divisors (1420099).

9940637 is a wasteful number, since it uses less digits than its factorization.

9940637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1420098.

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 9940637 is about 3152.8775745341. The cubic root of 9940637 is about 215.0163102824.

The spelling of 9940637 in words is "nine million, nine hundred forty thousand, six hundred thirty-seven".