140669189 has 2 divisors, whose sum is σ = 140669190. Its totient is φ = 140669188.

The previous prime is 140669183. The next prime is 140669231. The reversal of 140669189 is 981966041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 140541025 + 128164 = 11855^2 + 358^2 .

It is a cyclic number.

It is not a de Polignac number, because 140669189 - 2⁸ = 140668933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140669183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70334594 + 70334595.

It is an arithmetic number, because the mean of its divisors is an integer number (70334595).

Almost surely, 2^140669189 is an apocalyptic number.

It is an amenable number.

140669189 is a deficient number, since it is larger than the sum of its proper divisors (1).

140669189 is an equidigital number, since it uses as much as digits as its factorization.

140669189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 140669189 is about 11860.4042511206. The cubic root of 140669189 is about 520.0754192877.

The spelling of 140669189 in words is "one hundred forty million, six hundred sixty-nine thousand, one hundred eighty-nine".