42784697 has 2 divisors, whose sum is σ = 42784698. Its totient is φ = 42784696.

The previous prime is 42784673. The next prime is 42784723. The reversal of 42784697 is 79648724.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42784681 + 16 = 6541^2 + 4^2 .

It is a cyclic number.

It is not a de Polignac number, because 42784697 - 2⁶ = 42784633 is a prime.

It is not a weakly prime, because it can be changed into another prime (42784397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21392348 + 21392349.

It is an arithmetic number, because the mean of its divisors is an integer number (21392349).

Almost surely, 2^42784697 is an apocalyptic number.

It is an amenable number.

42784697 is a deficient number, since it is larger than the sum of its proper divisors (1).

42784697 is an equidigital number, since it uses as much as digits as its factorization.

42784697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 677376, while the sum is 47.

The square root of 42784697 is about 6541.0012230545. The cubic root of 42784697 is about 349.7541048360.

The spelling of 42784697 in words is "forty-two million, seven hundred eighty-four thousand, six hundred ninety-seven".