1909741 has 2 divisors, whose sum is σ = 1909742. Its totient is φ = 1909740.

The previous prime is 1909717. The next prime is 1909757. The reversal of 1909741 is 1479091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1901641 + 8100 = 1379^2 + 90^2 .

It is a cyclic number.

It is not a de Polignac number, because 1909741 - 2¹¹ = 1907693 is a prime.

It is a super-2 number, since 2×1909741² = 7294221374162, which contains 22 as substring.

It is equal to p₁₄₂₆₉₉ and since 1909741 and 142699 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 (1909241) 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, 954870 + 954871.

It is an arithmetic number, because the mean of its divisors is an integer number (954871).

2^1909741 is an apocalyptic number.

It is an amenable number.

1909741 is a deficient number, since it is larger than the sum of its proper divisors (1).

1909741 is an equidigital number, since it uses as much as digits as its factorization.

1909741 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 1909741 is about 1381.9337900203. The cubic root of 1909741 is about 124.0675360509.

The spelling of 1909741 in words is "one million, nine hundred nine thousand, seven hundred forty-one".