140343881 has 2 divisors, whose sum is σ = 140343882. Its totient is φ = 140343880.

The previous prime is 140343877. The next prime is 140343883. The reversal of 140343881 is 188343041.

140343881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 103632400 + 36711481 = 10180^2 + 6059^2 .

It is an emirp because it is prime and its reverse (188343041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 140343881 - 2² = 140343877 is a prime.

It is a super-2 number, since 2×140343881² = 39392809868284322, which contains 22 as substring.

Together with 140343883, 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 (140343883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70171940 + 70171941.

It is an arithmetic number, because the mean of its divisors is an integer number (70171941).

Almost surely, 2^140343881 is an apocalyptic number.

It is an amenable number.

140343881 is a deficient number, since it is larger than the sum of its proper divisors (1).

140343881 is an equidigital number, since it uses as much as digits as its factorization.

140343881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 140343881 is about 11846.6822781739. The cubic root of 140343881 is about 519.6742054400.

The spelling of 140343881 in words is "one hundred forty million, three hundred forty-three thousand, eight hundred eighty-one".