1973709 has 6 divisors (see below), whose sum is σ = 2850926. Its totient is φ = 1315800.

The previous prime is 1973689. The next prime is 1973723. The reversal of 1973709 is 9073791.

It can be written as a sum of positive squares in only one way, i.e., 1108809 + 864900 = 1053^2 + 930^2 .

It is not a de Polignac number, because 1973709 - 2⁹ = 1973197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1973749) 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 in 5 ways as a sum of consecutive naturals, for example, 109642 + ... + 109659.

2^1973709 is an apocalyptic number.

It is an amenable number.

1973709 is a deficient number, since it is larger than the sum of its proper divisors (877217).

1973709 is a wasteful number, since it uses less digits than its factorization.

1973709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219307 (or 219304 counting only the distinct ones).

The product of its (nonzero) digits is 11907, while the sum is 36.

The square root of 1973709 is about 1404.8875399832. The cubic root of 1973709 is about 125.4375916541.

It can be divided in two parts, 1 and 973709, that added together give a triangular number (973710 = T₁₃₉₅).

The spelling of 1973709 in words is "one million, nine hundred seventy-three thousand, seven hundred nine".