140956891 has 2 divisors, whose sum is σ = 140956892. Its totient is φ = 140956890.

The previous prime is 140956889. The next prime is 140956961. The reversal of 140956891 is 198659041.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 140956891 - 2¹ = 140956889 is a prime.

Together with 140956889, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (140956391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70478445 + 70478446.

It is an arithmetic number, because the mean of its divisors is an integer number (70478446).

Almost surely, 2^140956891 is an apocalyptic number.

140956891 is a deficient number, since it is larger than the sum of its proper divisors (1).

140956891 is an equidigital number, since it uses as much as digits as its factorization.

140956891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 43.

The square root of 140956891 is about 11872.5267319135. The cubic root of 140956891 is about 520.4297372153.

The spelling of 140956891 in words is "one hundred forty million, nine hundred fifty-six thousand, eight hundred ninety-one".