139223087 has 2 divisors, whose sum is σ = 139223088. Its totient is φ = 139223086.

The previous prime is 139223083. The next prime is 139223093. The reversal of 139223087 is 780322931.

It is a weak prime.

It is an emirp because it is prime and its reverse (780322931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 139223087 - 2² = 139223083 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139223083) 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 as a sum of consecutive naturals, namely, 69611543 + 69611544.

It is an arithmetic number, because the mean of its divisors is an integer number (69611544).

Almost surely, 2^139223087 is an apocalyptic number.

139223087 is a deficient number, since it is larger than the sum of its proper divisors (1).

139223087 is an equidigital number, since it uses as much as digits as its factorization.

139223087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 139223087 is about 11799.2833256940. The cubic root of 139223087 is about 518.2871241039.

The spelling of 139223087 in words is "one hundred thirty-nine million, two hundred twenty-three thousand, eighty-seven".