1670569 has 2 divisors, whose sum is σ = 1670570. Its totient is φ = 1670568.

The previous prime is 1670567. The next prime is 1670579. The reversal of 1670569 is 9650761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1625625 + 44944 = 1275^2 + 212^2 .

It is an emirp because it is prime and its reverse (9650761) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1670569 - 2¹ = 1670567 is a prime.

It is a super-2 number, since 2×1670569² = 5581601567522, which contains 22 as substring.

Together with 1670567, it forms a pair of twin primes.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (1670561) 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, 835284 + 835285.

It is an arithmetic number, because the mean of its divisors is an integer number (835285).

2^1670569 is an apocalyptic number.

It is an amenable number.

1670569 is a deficient number, since it is larger than the sum of its proper divisors (1).

1670569 is an equidigital number, since it uses as much as digits as its factorization.

1670569 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11340, while the sum is 34.

The square root of 1670569 is about 1292.5049322923. The cubic root of 1670569 is about 118.6555725787.

The spelling of 1670569 in words is "one million, six hundred seventy thousand, five hundred sixty-nine".