39440131 has 2 divisors, whose sum is σ = 39440132. Its totient is φ = 39440130.

The previous prime is 39440123. The next prime is 39440171. The reversal of 39440131 is 13104493.

It is a happy number.

39440131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 39440131 - 2³ = 39440123 is a prime.

It is a super-2 number, since 2×39440131² = 3111047866594322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 39440096 and 39440105.

It is not a weakly prime, because it can be changed into another prime (39440111) 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 as a sum of consecutive naturals, namely, 19720065 + 19720066.

It is an arithmetic number, because the mean of its divisors is an integer number (19720066).

Almost surely, 2^39440131 is an apocalyptic number.

39440131 is a deficient number, since it is larger than the sum of its proper divisors (1).

39440131 is an equidigital number, since it uses as much as digits as its factorization.

39440131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 39440131 is about 6280.1378169591. The cubic root of 39440131 is about 340.3920822856.

The spelling of 39440131 in words is "thirty-nine million, four hundred forty thousand, one hundred thirty-one".