140831849 has 2 divisors, whose sum is σ = 140831850. Its totient is φ = 140831848.

The previous prime is 140831839. The next prime is 140831851. The reversal of 140831849 is 948138041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 137475625 + 3356224 = 11725^2 + 1832^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140831849 is a prime.

Together with 140831851, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (140831839) 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, 70415924 + 70415925.

It is an arithmetic number, because the mean of its divisors is an integer number (70415925).

Almost surely, 2^140831849 is an apocalyptic number.

It is an amenable number.

140831849 is a deficient number, since it is larger than the sum of its proper divisors (1).

140831849 is an equidigital number, since it uses as much as digits as its factorization.

140831849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 140831849 is about 11867.2595404331. The cubic root of 140831849 is about 520.2758016706.

The spelling of 140831849 in words is "one hundred forty million, eight hundred thirty-one thousand, eight hundred forty-nine".