140431017 has 4 divisors (see below), whose sum is σ = 187241360. Its totient is φ = 93620676.

The previous prime is 140431013. The next prime is 140431019. The reversal of 140431017 is 710134041.

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: 710134041 = 3 ⋅236711347.

It is not a de Polignac number, because 140431017 - 2² = 140431013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 140430984 and 140431002.

It is not an unprimeable number, because it can be changed into a prime (140431013) 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, 23405167 + ... + 23405172.

It is an arithmetic number, because the mean of its divisors is an integer number (46810340).

Almost surely, 2^140431017 is an apocalyptic number.

It is an amenable number.

140431017 is a deficient number, since it is larger than the sum of its proper divisors (46810343).

140431017 is an equidigital number, since it uses as much as digits as its factorization.

140431017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46810342.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 140431017 is about 11850.3593616396. The cubic root of 140431017 is about 519.7817340878.

Adding to 140431017 its reverse (710134041), we get a palindrome (850565058).

The spelling of 140431017 in words is "one hundred forty million, four hundred thirty-one thousand, seventeen".