140555669 has 2 divisors, whose sum is σ = 140555670. Its totient is φ = 140555668.

The previous prime is 140555627. The next prime is 140555671. The reversal of 140555669 is 966555041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123498769 + 17056900 = 11113^2 + 4130^2 .

It is a cyclic number.

It is not a de Polignac number, because 140555669 - 2⁸ = 140555413 is a prime.

It is a super-2 number, since 2×140555669² = 39511792176075122, which contains 22 as substring.

Together with 140555671, 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 (140555689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70277834 + 70277835.

It is an arithmetic number, because the mean of its divisors is an integer number (70277835).

Almost surely, 2^140555669 is an apocalyptic number.

It is an amenable number.

140555669 is a deficient number, since it is larger than the sum of its proper divisors (1).

140555669 is an equidigital number, since it uses as much as digits as its factorization.

140555669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162000, while the sum is 41.

The square root of 140555669 is about 11855.6176136041. The cubic root of 140555669 is about 519.9354813937.

The spelling of 140555669 in words is "one hundred forty million, five hundred fifty-five thousand, six hundred sixty-nine".