42789469 has 2 divisors, whose sum is σ = 42789470. Its totient is φ = 42789468.

The previous prime is 42789443. The next prime is 42789521. The reversal of 42789469 is 96498724.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27092025 + 15697444 = 5205^2 + 3962^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42789469 is a prime.

It is a super-2 number, since 2×42789469² = 3661877314603922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42789419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21394734 + 21394735.

It is an arithmetic number, because the mean of its divisors is an integer number (21394735).

Almost surely, 2^42789469 is an apocalyptic number.

It is an amenable number.

42789469 is a deficient number, since it is larger than the sum of its proper divisors (1).

42789469 is an equidigital number, since it uses as much as digits as its factorization.

42789469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 49.

The square root of 42789469 is about 6541.3659888436. The cubic root of 42789469 is about 349.7671076513.

The spelling of 42789469 in words is "forty-two million, seven hundred eighty-nine thousand, four hundred sixty-nine".