140597857 has 2 divisors, whose sum is σ = 140597858. Its totient is φ = 140597856.

The previous prime is 140597851. The next prime is 140597861. The reversal of 140597857 is 758795041.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107143201 + 33454656 = 10351^2 + 5784^2 .

It is an emirp because it is prime and its reverse (758795041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 140597857 - 2⁷ = 140597729 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (140597851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70298928 + 70298929.

It is an arithmetic number, because the mean of its divisors is an integer number (70298929).

Almost surely, 2^140597857 is an apocalyptic number.

It is an amenable number.

140597857 is a deficient number, since it is larger than the sum of its proper divisors (1).

140597857 is an equidigital number, since it uses as much as digits as its factorization.

140597857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 352800, while the sum is 46.

The square root of 140597857 is about 11857.3967210345. The cubic root of 140597857 is about 519.9874960011.

The spelling of 140597857 in words is "one hundred forty million, five hundred ninety-seven thousand, eight hundred fifty-seven".