140234389 has 2 divisors, whose sum is σ = 140234390. Its totient is φ = 140234388.

The previous prime is 140234371. The next prime is 140234431. The reversal of 140234389 is 983432041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 139641489 + 592900 = 11817^2 + 770^2 .

It is an emirp because it is prime and its reverse (983432041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 140234389 - 2⁵ = 140234357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140234089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70117194 + 70117195.

It is an arithmetic number, because the mean of its divisors is an integer number (70117195).

Almost surely, 2^140234389 is an apocalyptic number.

It is an amenable number.

140234389 is a deficient number, since it is larger than the sum of its proper divisors (1).

140234389 is an equidigital number, since it uses as much as digits as its factorization.

140234389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 140234389 is about 11842.0601670486. The cubic root of 140234389 is about 519.5390256436.

The spelling of 140234389 in words is "one hundred forty million, two hundred thirty-four thousand, three hundred eighty-nine".