140128577 has 2 divisors, whose sum is σ = 140128578. Its totient is φ = 140128576.

The previous prime is 140128561. The next prime is 140128579. The reversal of 140128577 is 775821041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128232976 + 11895601 = 11324^2 + 3449^2 .

It is an emirp because it is prime and its reverse (775821041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 140128577 - 2⁴ = 140128561 is a prime.

Together with 140128579, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (140128579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70064288 + 70064289.

It is an arithmetic number, because the mean of its divisors is an integer number (70064289).

Almost surely, 2^140128577 is an apocalyptic number.

It is an amenable number.

140128577 is a deficient number, since it is larger than the sum of its proper divisors (1).

140128577 is an equidigital number, since it uses as much as digits as its factorization.

140128577 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15680, while the sum is 35.

The square root of 140128577 is about 11837.5916891908. The cubic root of 140128577 is about 519.4083223354.

The spelling of 140128577 in words is "one hundred forty million, one hundred twenty-eight thousand, five hundred seventy-seven".