1670899 has 2 divisors, whose sum is σ = 1670900. Its totient is φ = 1670898.

The previous prime is 1670891. The next prime is 1670923. The reversal of 1670899 is 9980761.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1670899 - 2³ = 1670891 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1670891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 835449 + 835450.

It is an arithmetic number, because the mean of its divisors is an integer number (835450).

2^1670899 is an apocalyptic number.

1670899 is a deficient number, since it is larger than the sum of its proper divisors (1).

1670899 is an equidigital number, since it uses as much as digits as its factorization.

1670899 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 1670899 is about 1292.6325850759. The cubic root of 1670899 is about 118.6633850388.

It can be divided in two parts, 16708 and 99, that added together give a 5-th power (16807 = 7⁵).

The spelling of 1670899 in words is "one million, six hundred seventy thousand, eight hundred ninety-nine".