42476809 has 4 divisors (see below), whose sum is σ = 42500116. Its totient is φ = 42453504.

The previous prime is 42476807. The next prime is 42476831. The reversal of 42476809 is 90867424.

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 21132409 + 21344400 = 4597^2 + 4620^2 .

It is a cyclic number.

It is not a de Polignac number, because 42476809 - 2¹ = 42476807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42476807) 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, 8664 + ... + 12649.

It is an arithmetic number, because the mean of its divisors is an integer number (10625029).

Almost surely, 2^42476809 is an apocalyptic number.

It is an amenable number.

42476809 is a deficient number, since it is larger than the sum of its proper divisors (23307).

42476809 is a wasteful number, since it uses less digits than its factorization.

42476809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23306.

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 42476809 is about 6517.4234939890. The cubic root of 42476809 is about 348.9131153738.

The spelling of 42476809 in words is "forty-two million, four hundred seventy-six thousand, eight hundred nine".