140354857 has 2 divisors, whose sum is σ = 140354858. Its totient is φ = 140354856.

The previous prime is 140354827. The next prime is 140354891. The reversal of 140354857 is 758453041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 137733696 + 2621161 = 11736^2 + 1619^2 .

It is an emirp because it is prime and its reverse (758453041) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140354857 is a prime.

It is not a weakly prime, because it can be changed into another prime (140354807) 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, 70177428 + 70177429.

It is an arithmetic number, because the mean of its divisors is an integer number (70177429).

Almost surely, 2^140354857 is an apocalyptic number.

It is an amenable number.

140354857 is a deficient number, since it is larger than the sum of its proper divisors (1).

140354857 is an equidigital number, since it uses as much as digits as its factorization.

140354857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 67200, while the sum is 37.

The square root of 140354857 is about 11847.1455211794. The cubic root of 140354857 is about 519.6877526293.

The spelling of 140354857 in words is "one hundred forty million, three hundred fifty-four thousand, eight hundred fifty-seven".