140747857 has 4 divisors (see below), whose sum is σ = 140797440. Its totient is φ = 140698276.

The previous prime is 140747851. The next prime is 140747881. The reversal of 140747857 is 758747041.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140747857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140747851) 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 in 3 ways as a sum of consecutive naturals, for example, 20257 + ... + 26302.

It is an arithmetic number, because the mean of its divisors is an integer number (35199360).

Almost surely, 2^140747857 is an apocalyptic number.

It is an amenable number.

140747857 is a deficient number, since it is larger than the sum of its proper divisors (49583).

140747857 is an equidigital number, since it uses as much as digits as its factorization.

140747857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49582.

The product of its (nonzero) digits is 219520, while the sum is 43.

The square root of 140747857 is about 11863.7202006790. The cubic root of 140747857 is about 520.1723504137.

The spelling of 140747857 in words is "one hundred forty million, seven hundred forty-seven thousand, eight hundred fifty-seven".