139857307 has 2 divisors, whose sum is σ = 139857308. Its totient is φ = 139857306.

The previous prime is 139857293. The next prime is 139857329. The reversal of 139857307 is 703758931.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139857307 is a prime.

It is not a weakly prime, because it can be changed into another prime (139858307) 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, 69928653 + 69928654.

It is an arithmetic number, because the mean of its divisors is an integer number (69928654).

Almost surely, 2^139857307 is an apocalyptic number.

139857307 is a deficient number, since it is larger than the sum of its proper divisors (1).

139857307 is an equidigital number, since it uses as much as digits as its factorization.

139857307 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 158760, while the sum is 43.

The square root of 139857307 is about 11826.1281491450. The cubic root of 139857307 is about 519.0729377013.

The spelling of 139857307 in words is "one hundred thirty-nine million, eight hundred fifty-seven thousand, three hundred seven".