9920437 has 4 divisors (see below), whose sum is σ = 10088640. Its totient is φ = 9752236.

The previous prime is 9920423. The next prime is 9920447. The reversal of 9920437 is 7340299.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9920437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9920447) 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, 84013 + ... + 84130.

It is an arithmetic number, because the mean of its divisors is an integer number (2522160).

Almost surely, 2^9920437 is an apocalyptic number.

It is an amenable number.

9920437 is a deficient number, since it is larger than the sum of its proper divisors (168203).

9920437 is a wasteful number, since it uses less digits than its factorization.

9920437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168202.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 9920437 is about 3149.6725226601. The cubic root of 9920437 is about 214.8705692946.

It can be divided in two parts, 9920 and 437, that multiplied together give a triangular number (4335040 = T₂₉₄₄).

The spelling of 9920437 in words is "nine million, nine hundred twenty thousand, four hundred thirty-seven".