42784619 has 4 divisors (see below), whose sum is σ = 44164800. Its totient is φ = 41404440.

The previous prime is 42784579. The next prime is 42784633. The reversal of 42784619 is 91648724.

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 42784619 - 2¹² = 42780523 is a prime.

It is a super-2 number, since 2×42784619² = 3661047245950322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42784639) 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, 690044 + ... + 690105.

It is an arithmetic number, because the mean of its divisors is an integer number (11041200).

Almost surely, 2^42784619 is an apocalyptic number.

42784619 is a deficient number, since it is larger than the sum of its proper divisors (1380181).

42784619 is a wasteful number, since it uses less digits than its factorization.

42784619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1380180.

The product of its digits is 96768, while the sum is 41.

The square root of 42784619 is about 6540.9952606618. The cubic root of 42784619 is about 349.7538922924.

The spelling of 42784619 in words is "forty-two million, seven hundred eighty-four thousand, six hundred nineteen".