139973263 has 2 divisors, whose sum is σ = 139973264. Its totient is φ = 139973262.

The previous prime is 139973261. The next prime is 139973321. The reversal of 139973263 is 362379931.

It is a weak prime.

It is an emirp because it is prime and its reverse (362379931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 139973263 - 2¹ = 139973261 is a prime.

Together with 139973261, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139973261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69986631 + 69986632.

It is an arithmetic number, because the mean of its divisors is an integer number (69986632).

Almost surely, 2^139973263 is an apocalyptic number.

139973263 is a deficient number, since it is larger than the sum of its proper divisors (1).

139973263 is an equidigital number, since it uses as much as digits as its factorization.

139973263 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 183708, while the sum is 43.

The square root of 139973263 is about 11831.0296677846. The cubic root of 139973263 is about 519.2163529104.

The spelling of 139973263 in words is "one hundred thirty-nine million, nine hundred seventy-three thousand, two hundred sixty-three".