140657207 has 4 divisors (see below), whose sum is σ = 141261120. Its totient is φ = 140053296.

The previous prime is 140657173. The next prime is 140657219. The reversal of 140657207 is 702756041.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 140657207 - 2¹² = 140653111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140657267) 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, 301607 + ... + 302072.

It is an arithmetic number, because the mean of its divisors is an integer number (35315280).

Almost surely, 2^140657207 is an apocalyptic number.

140657207 is a deficient number, since it is larger than the sum of its proper divisors (603913).

140657207 is an equidigital number, since it uses as much as digits as its factorization.

140657207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 603912.

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 140657207 is about 11859.8991142421. The cubic root of 140657207 is about 520.0606524420.

The spelling of 140657207 in words is "one hundred forty million, six hundred fifty-seven thousand, two hundred seven".