3909973 has 8 divisors (see below), whose sum is σ = 3990168. Its totient is φ = 3830784.

The previous prime is 3909967. The next prime is 3909979. The reversal of 3909973 is 3799093.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (3909967) and next prime (3909979).

It can be written as a sum of positive squares in 4 ways, for example, as 734449 + 3175524 = 857^2 + 1782^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3909973 - 2²¹ = 1812821 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 (3909979) 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 7 ways as a sum of consecutive naturals, for example, 16665 + ... + 16897.

It is an arithmetic number, because the mean of its divisors is an integer number (498771).

Almost surely, 2^3909973 is an apocalyptic number.

It is an amenable number.

3909973 is a deficient number, since it is larger than the sum of its proper divisors (80195).

3909973 is a wasteful number, since it uses less digits than its factorization.

3909973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503.

The product of its (nonzero) digits is 45927, while the sum is 40.

The square root of 3909973 is about 1977.3651660733. The cubic root of 3909973 is about 157.5401493344.

The spelling of 3909973 in words is "three million, nine hundred nine thousand, nine hundred seventy-three".