140153857 has 2 divisors, whose sum is σ = 140153858. Its totient is φ = 140153856.

The previous prime is 140153837. The next prime is 140153869. The reversal of 140153857 is 758351041.

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., 131997121 + 8156736 = 11489^2 + 2856^2 .

It is a cyclic number.

It is not a de Polignac number, because 140153857 - 2¹⁹ = 139629569 is a prime.

It is not a weakly prime, because it can be changed into another prime (140153807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70076928 + 70076929.

It is an arithmetic number, because the mean of its divisors is an integer number (70076929).

Almost surely, 2^140153857 is an apocalyptic number.

It is an amenable number.

140153857 is a deficient number, since it is larger than the sum of its proper divisors (1).

140153857 is an equidigital number, since it uses as much as digits as its factorization.

140153857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16800, while the sum is 34.

The square root of 140153857 is about 11838.6594257965. The cubic root of 140153857 is about 519.4395552054.

The spelling of 140153857 in words is "one hundred forty million, one hundred fifty-three thousand, eight hundred fifty-seven".