42783569 has 2 divisors, whose sum is σ = 42783570. Its totient is φ = 42783568.

The previous prime is 42783557. The next prime is 42783571. The reversal of 42783569 is 96538724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30393169 + 12390400 = 5513^2 + 3520^2 .

It is a cyclic number.

It is not a de Polignac number, because 42783569 - 2⁴ = 42783553 is a prime.

It is a super-2 number, since 2×42783569² = 3660867552755522, which contains 22 as substring.

Together with 42783571, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42783539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21391784 + 21391785.

It is an arithmetic number, because the mean of its divisors is an integer number (21391785).

Almost surely, 2^42783569 is an apocalyptic number.

It is an amenable number.

42783569 is a deficient number, since it is larger than the sum of its proper divisors (1).

42783569 is an equidigital number, since it uses as much as digits as its factorization.

42783569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 44.

The square root of 42783569 is about 6540.9149971545. The cubic root of 42783569 is about 349.7510311038.

The spelling of 42783569 in words is "forty-two million, seven hundred eighty-three thousand, five hundred sixty-nine".