39873131 has 2 divisors, whose sum is σ = 39873132. Its totient is φ = 39873130.

The previous prime is 39873089. The next prime is 39873139. The reversal of 39873131 is 13137893.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39873131 is a prime.

It is a super-2 number, since 2×39873131² = 3179733151486322, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 39873091 and 39873100.

It is not a weakly prime, because it can be changed into another prime (39873139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19936565 + 19936566.

It is an arithmetic number, because the mean of its divisors is an integer number (19936566).

Almost surely, 2^39873131 is an apocalyptic number.

39873131 is a deficient number, since it is larger than the sum of its proper divisors (1).

39873131 is an equidigital number, since it uses as much as digits as its factorization.

39873131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13608, while the sum is 35.

The square root of 39873131 is about 6314.5174795862. The cubic root of 39873131 is about 341.6332348278.

It can be divided in two parts, 39873 and 131, that added together give a palindrome (40004).

The spelling of 39873131 in words is "thirty-nine million, eight hundred seventy-three thousand, one hundred thirty-one".