9920637 has 10 divisors (see below), whose sum is σ = 14819838. Its totient is φ = 6613704.

The previous prime is 9920621. The next prime is 9920653. The reversal of 9920637 is 7360299.

It is an interprime number because it is at equal distance from previous prime (9920621) and next prime (9920653).

It can be written as a sum of positive squares in only one way, i.e., 9865881 + 54756 = 3141^2 + 234^2 .

It is not a de Polignac number, because 9920637 - 2⁴ = 9920621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9920657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 61158 + ... + 61319.

Almost surely, 2^9920637 is an apocalyptic number.

It is an amenable number.

9920637 is a deficient number, since it is larger than the sum of its proper divisors (4899201).

9920637 is a wasteful number, since it uses less digits than its factorization.

9920637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122489 (or 122480 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 36.

The square root of 9920637 is about 3149.7042718325. The cubic root of 9920637 is about 214.8720132439.

It can be divided in two parts, 99 and 20637, that added together give a 4-th power (20736 = 12⁴).

The spelling of 9920637 in words is "nine million, nine hundred twenty thousand, six hundred thirty-seven".