140172287 has 2 divisors, whose sum is σ = 140172288. Its totient is φ = 140172286.

The previous prime is 140172271. The next prime is 140172343. The reversal of 140172287 is 782271041.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (782271041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 140172287 - 2⁴ = 140172271 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140172257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70086143 + 70086144.

It is an arithmetic number, because the mean of its divisors is an integer number (70086144).

Almost surely, 2^140172287 is an apocalyptic number.

140172287 is a deficient number, since it is larger than the sum of its proper divisors (1).

140172287 is an equidigital number, since it uses as much as digits as its factorization.

140172287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6272, while the sum is 32.

The square root of 140172287 is about 11839.4377822598. The cubic root of 140172287 is about 519.4623226877.

The spelling of 140172287 in words is "one hundred forty million, one hundred seventy-two thousand, two hundred eighty-seven".