42937809 has 8 divisors (see below), whose sum is σ = 57940512. Its totient is φ = 28280160.

The previous prime is 42937793. The next prime is 42937813. The reversal of 42937809 is 90873924.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42937809 - 2⁴ = 42937793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42937109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85972 + ... + 86469.

It is an arithmetic number, because the mean of its divisors is an integer number (7242564).

Almost surely, 2^42937809 is an apocalyptic number.

It is an amenable number.

42937809 is a deficient number, since it is larger than the sum of its proper divisors (15002703).

42937809 is a wasteful number, since it uses less digits than its factorization.

42937809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172527.

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 42937809 is about 6552.6947891688. The cubic root of 42937809 is about 350.1708254547.

The spelling of 42937809 in words is "forty-two million, nine hundred thirty-seven thousand, eight hundred nine".