1429778569 has 2 divisors, whose sum is σ = 1429778570. Its totient is φ = 1429778568.

The previous prime is 1429778563. The next prime is 1429778599. The reversal of 1429778569 is 9658779241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1233414400 + 196364169 = 35120^2 + 14013^2 .

It is an emirp because it is prime and its reverse (9658779241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1429778569 - 2²³ = 1421389961 is a prime.

It is a super-2 number, since 2×1429778569² = 4088533512743375522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1429778563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 714889284 + 714889285.

It is an arithmetic number, because the mean of its divisors is an integer number (714889285).

Almost surely, 2^1429778569 is an apocalyptic number.

It is an amenable number.

1429778569 is a deficient number, since it is larger than the sum of its proper divisors (1).

1429778569 is an equidigital number, since it uses as much as digits as its factorization.

1429778569 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7620480, while the sum is 58.

The square root of 1429778569 is about 37812.4128957674. The cubic root of 1429778569 is about 1126.5650169819.

The spelling of 1429778569 in words is "one billion, four hundred twenty-nine million, seven hundred seventy-eight thousand, five hundred sixty-nine".