1670887 has 2 divisors, whose sum is σ = 1670888. Its totient is φ = 1670886.

The previous prime is 1670863. The next prime is 1670891. The reversal of 1670887 is 7880761.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1670887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1670827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 835443 + 835444.

It is an arithmetic number, because the mean of its divisors is an integer number (835444).

2^1670887 is an apocalyptic number.

1670887 is a deficient number, since it is larger than the sum of its proper divisors (1).

1670887 is an equidigital number, since it uses as much as digits as its factorization.

1670887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18816, while the sum is 37.

The square root of 1670887 is about 1292.6279433774. The cubic root of 1670887 is about 118.6631009674.

The spelling of 1670887 in words is "one million, six hundred seventy thousand, eight hundred eighty-seven".