140629669 has 2 divisors, whose sum is σ = 140629670. Its totient is φ = 140629668.

The previous prime is 140629667. The next prime is 140629691. The reversal of 140629669 is 966926041.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121837444 + 18792225 = 11038^2 + 4335^2 .

It is a cyclic number.

It is not a de Polignac number, because 140629669 - 2¹ = 140629667 is a prime.

It is a super-2 number, since 2×140629669² = 39553407606099122, which contains 22 as substring.

Together with 140629667, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140629667) 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, 70314834 + 70314835.

It is an arithmetic number, because the mean of its divisors is an integer number (70314835).

Almost surely, 2^140629669 is an apocalyptic number.

It is an amenable number.

140629669 is a deficient number, since it is larger than the sum of its proper divisors (1).

140629669 is an equidigital number, since it uses as much as digits as its factorization.

140629669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 139968, while the sum is 43.

The square root of 140629669 is about 11858.7380863227. The cubic root of 140629669 is about 520.0267109060.

The spelling of 140629669 in words is "one hundred forty million, six hundred twenty-nine thousand, six hundred sixty-nine".