8404537 has 4 divisors (see below), whose sum is σ = 8499060. Its totient is φ = 8310016.

The previous prime is 8404531. The next prime is 8404553. The reversal of 8404537 is 7354048.

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 2134521 + 6270016 = 1461^2 + 2504^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8404537 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8404499 and 8404508.

It is not an unprimeable number, because it can be changed into a prime (8404531) 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, 47128 + ... + 47305.

It is an arithmetic number, because the mean of its divisors is an integer number (2124765).

Almost surely, 2^8404537 is an apocalyptic number.

It is an amenable number.

8404537 is a deficient number, since it is larger than the sum of its proper divisors (94523).

8404537 is an equidigital number, since it uses as much as digits as its factorization.

8404537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94522.

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 8404537 is about 2899.0579504384. The cubic root of 8404537 is about 203.3158631113.

The spelling of 8404537 in words is "eight million, four hundred four thousand, five hundred thirty-seven".