139222813 has 2 divisors, whose sum is σ = 139222814. Its totient is φ = 139222812.

The previous prime is 139222793. The next prime is 139222871. The reversal of 139222813 is 318222931.

139222813 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 138933369 + 289444 = 11787^2 + 538^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139222813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139222513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69611406 + 69611407.

It is an arithmetic number, because the mean of its divisors is an integer number (69611407).

Almost surely, 2^139222813 is an apocalyptic number.

It is an amenable number.

139222813 is a deficient number, since it is larger than the sum of its proper divisors (1).

139222813 is an equidigital number, since it uses as much as digits as its factorization.

139222813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 31.

The square root of 139222813 is about 11799.2717148136. The cubic root of 139222813 is about 518.2867840962.

The spelling of 139222813 in words is "one hundred thirty-nine million, two hundred twenty-two thousand, eight hundred thirteen".