42904837 has 4 divisors (see below), whose sum is σ = 44288896. Its totient is φ = 41520780.

The previous prime is 42904769. The next prime is 42904861. The reversal of 42904837 is 73840924.

It is a happy number.

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 not a de Polignac number, because 42904837 - 2⁷ = 42904709 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 9.

It is a junction number, because it is equal to n+sod(n) for n = 42904796 and 42904805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42904237) 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, 691983 + ... + 692044.

It is an arithmetic number, because the mean of its divisors is an integer number (11072224).

Almost surely, 2^42904837 is an apocalyptic number.

It is an amenable number.

42904837 is a deficient number, since it is larger than the sum of its proper divisors (1384059).

42904837 is a wasteful number, since it uses less digits than its factorization.

42904837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1384058.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 42904837 is about 6550.1783945172. The cubic root of 42904837 is about 350.0811702896.

The spelling of 42904837 in words is "forty-two million, nine hundred four thousand, eight hundred thirty-seven".