139851863 has 2 divisors, whose sum is σ = 139851864. Its totient is φ = 139851862.

The previous prime is 139851839. The next prime is 139851941. The reversal of 139851863 is 368158931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 139851863 - 2¹² = 139847767 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139851263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69925931 + 69925932.

It is an arithmetic number, because the mean of its divisors is an integer number (69925932).

Almost surely, 2^139851863 is an apocalyptic number.

139851863 is a deficient number, since it is larger than the sum of its proper divisors (1).

139851863 is an equidigital number, since it uses as much as digits as its factorization.

139851863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 44.

The square root of 139851863 is about 11825.8979785892. The cubic root of 139851863 is about 519.0662025754.

The spelling of 139851863 in words is "one hundred thirty-nine million, eight hundred fifty-one thousand, eight hundred sixty-three".