140684669 has 2 divisors, whose sum is σ = 140684670. Its totient is φ = 140684668.

The previous prime is 140684647. The next prime is 140684671. The reversal of 140684669 is 966486041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107391769 + 33292900 = 10363^2 + 5770^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140684669 is a prime.

It is a super-2 number, since 2×140684669² = 39584352183279122, which contains 22 as substring.

Together with 140684671, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140684689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70342334 + 70342335.

It is an arithmetic number, because the mean of its divisors is an integer number (70342335).

Almost surely, 2^140684669 is an apocalyptic number.

It is an amenable number.

140684669 is a deficient number, since it is larger than the sum of its proper divisors (1).

140684669 is an equidigital number, since it uses as much as digits as its factorization.

140684669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 248832, while the sum is 44.

The square root of 140684669 is about 11861.0568247522. The cubic root of 140684669 is about 520.0944958940.

The spelling of 140684669 in words is "one hundred forty million, six hundred eighty-four thousand, six hundred sixty-nine".