39873437425 has 6 divisors (see below), whose sum is σ = 49443062438. Its totient is φ = 31898749920.

The previous prime is 39873437419. The next prime is 39873437447. The reversal of 39873437425 is 52473437893.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 16908544 + 39856528881 = 4112^2 + 199641^2 .

It is not a de Polignac number, because 39873437425 - 2¹¹ = 39873435377 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 797468724 + ... + 797468773.

Almost surely, 2^39873437425 is an apocalyptic number.

It is an amenable number.

39873437425 is a deficient number, since it is larger than the sum of its proper divisors (9569625013).

39873437425 is a wasteful number, since it uses less digits than its factorization.

39873437425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1594937507 (or 1594937502 counting only the distinct ones).

The product of its digits is 15240960, while the sum is 55.

The spelling of 39873437425 in words is "thirty-nine billion, eight hundred seventy-three million, four hundred thirty-seven thousand, four hundred twenty-five".