1704991 has 2 divisors, whose sum is σ = 1704992. Its totient is φ = 1704990.

The previous prime is 1704979. The next prime is 1705001. The reversal of 1704991 is 1994071.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1704991 is a prime.

It is equal to p₁₂₈₄₈₈ and since 1704991 and 128488 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1704931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 852495 + 852496.

It is an arithmetic number, because the mean of its divisors is an integer number (852496).

2^1704991 is an apocalyptic number.

1704991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1704991 is an equidigital number, since it uses as much as digits as its factorization.

1704991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 31.

The square root of 1704991 is about 1305.7530394374. The cubic root of 1704991 is about 119.4650026189.

The spelling of 1704991 in words is "one million, seven hundred four thousand, nine hundred ninety-one".