140855989 has 2 divisors, whose sum is σ = 140855990. Its totient is φ = 140855988.

The previous prime is 140855963. The next prime is 140856007. The reversal of 140855989 is 989558041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128640964 + 12215025 = 11342^2 + 3495^2 .

It is a cyclic number.

It is not a de Polignac number, because 140855989 - 2⁷ = 140855861 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140855959) 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, 70427994 + 70427995.

It is an arithmetic number, because the mean of its divisors is an integer number (70427995).

Almost surely, 2^140855989 is an apocalyptic number.

It is an amenable number.

140855989 is a deficient number, since it is larger than the sum of its proper divisors (1).

140855989 is an equidigital number, since it uses as much as digits as its factorization.

140855989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 518400, while the sum is 49.

The square root of 140855989 is about 11868.2765808688. The cubic root of 140855989 is about 520.3055268130.

The spelling of 140855989 in words is "one hundred forty million, eight hundred fifty-five thousand, nine hundred eighty-nine".