140140831 has 2 divisors, whose sum is σ = 140140832. Its totient is φ = 140140830.

The previous prime is 140140823. The next prime is 140140841. The reversal of 140140831 is 138041041.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 140140831 - 2³ = 140140823 is a prime.

It is a super-2 number, since 2×140140831² = 39278905026741122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140140841) 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, 70070415 + 70070416.

It is an arithmetic number, because the mean of its divisors is an integer number (70070416).

Almost surely, 2^140140831 is an apocalyptic number.

140140831 is a deficient number, since it is larger than the sum of its proper divisors (1).

140140831 is an equidigital number, since it uses as much as digits as its factorization.

140140831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 140140831 is about 11838.1092662638. The cubic root of 140140831 is about 519.4234623452.

Adding to 140140831 its reverse (138041041), we get a palindrome (278181872).

The spelling of 140140831 in words is "one hundred forty million, one hundred forty thousand, eight hundred thirty-one".