140439031 has 4 divisors (see below), whose sum is σ = 140888032. Its totient is φ = 139990032.

The previous prime is 140439001. The next prime is 140439043. The reversal of 140439031 is 130934041.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 140439031 - 2²³ = 132050423 is a prime.

It is a super-2 number, since 2×140439031² = 39446242856437922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 140438987 and 140439005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140439001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 224031 + ... + 224656.

It is an arithmetic number, because the mean of its divisors is an integer number (35222008).

Almost surely, 2^140439031 is an apocalyptic number.

140439031 is a deficient number, since it is larger than the sum of its proper divisors (449001).

140439031 is an equidigital number, since it uses as much as digits as its factorization.

140439031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449000.

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

The square root of 140439031 is about 11850.6974900214. The cubic root of 140439031 is about 519.7916213896.

The spelling of 140439031 in words is "one hundred forty million, four hundred thirty-nine thousand, thirty-one".