39666973 has 4 divisors (see below), whose sum is σ = 41391648. Its totient is φ = 37942300.

The previous prime is 39666971. The next prime is 39667031. The reversal of 39666973 is 37966693.

39666973 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 39666973 - 2¹ = 39666971 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 (39666971) 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 3 ways as a sum of consecutive naturals, for example, 862303 + ... + 862348.

It is an arithmetic number, because the mean of its divisors is an integer number (10347912).

Almost surely, 2^39666973 is an apocalyptic number.

It is an amenable number.

39666973 is a deficient number, since it is larger than the sum of its proper divisors (1724675).

39666973 is a wasteful number, since it uses less digits than its factorization.

39666973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1724674.

The product of its digits is 1102248, while the sum is 49.

The square root of 39666973 is about 6298.1721951690. The cubic root of 39666973 is about 341.0434294809.

The spelling of 39666973 in words is "thirty-nine million, six hundred sixty-six thousand, nine hundred seventy-three".