39919673 has 4 divisors (see below), whose sum is σ = 39936768. Its totient is φ = 39902580.

The previous prime is 39919643. The next prime is 39919687. The reversal of 39919673 is 37691993.

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, and also an emirpimes, since its reverse is a distinct semiprime: 37691993 = 199 ⋅189407.

It is a cyclic number.

It is not a de Polignac number, because 39919673 - 2¹⁴ = 39903289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39919613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4361 + ... + 9942.

It is an arithmetic number, because the mean of its divisors is an integer number (9984192).

Almost surely, 2^39919673 is an apocalyptic number.

It is an amenable number.

39919673 is a deficient number, since it is larger than the sum of its proper divisors (17095).

39919673 is a wasteful number, since it uses less digits than its factorization.

39919673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17094.

The product of its digits is 275562, while the sum is 47.

The square root of 39919673 is about 6318.2017220092. The cubic root of 39919673 is about 341.7661071914.

The spelling of 39919673 in words is "thirty-nine million, nine hundred nineteen thousand, six hundred seventy-three".