139028713 has 2 divisors, whose sum is σ = 139028714. Its totient is φ = 139028712.

The previous prime is 139028693. The next prime is 139028717. The reversal of 139028713 is 317820931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 137170944 + 1857769 = 11712^2 + 1363^2 .

It is an emirp because it is prime and its reverse (317820931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 139028713 - 2¹³ = 139020521 is a prime.

It is not a weakly prime, because it can be changed into another prime (139028717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69514356 + 69514357.

It is an arithmetic number, because the mean of its divisors is an integer number (69514357).

Almost surely, 2^139028713 is an apocalyptic number.

It is an amenable number.

139028713 is a deficient number, since it is larger than the sum of its proper divisors (1).

139028713 is an equidigital number, since it uses as much as digits as its factorization.

139028713 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 139028713 is about 11791.0437621103. The cubic root of 139028713 is about 518.0458124486.

It can be divided in two parts, 1390 and 28713, that added together give a palindrome (30103).

The spelling of 139028713 in words is "one hundred thirty-nine million, twenty-eight thousand, seven hundred thirteen".