42784727 has 4 divisors (see below), whose sum is σ = 43592040. Its totient is φ = 41977416.

The previous prime is 42784723. The next prime is 42784769. The reversal of 42784727 is 72748724.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42784727 - 2² = 42784723 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 (42784723) 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, 403577 + ... + 403682.

It is an arithmetic number, because the mean of its divisors is an integer number (10898010).

Almost surely, 2^42784727 is an apocalyptic number.

42784727 is a deficient number, since it is larger than the sum of its proper divisors (807313).

42784727 is an equidigital number, since it uses as much as digits as its factorization.

42784727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 807312.

The product of its digits is 175616, while the sum is 41.

The square root of 42784727 is about 6541.0035162810. The cubic root of 42784727 is about 349.7541865834.

The spelling of 42784727 in words is "forty-two million, seven hundred eighty-four thousand, seven hundred twenty-seven".