139630016209 has 2 divisors, whose sum is σ = 139630016210. Its totient is φ = 139630016208.

The previous prime is 139630016179. The next prime is 139630016219. The reversal of 139630016209 is 902610036931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138716767809 + 913248400 = 372447^2 + 30220^2 .

It is a cyclic number.

It is not a de Polignac number, because 139630016209 - 2⁹ = 139630015697 is a prime.

It is not a weakly prime, because it can be changed into another prime (139630016219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69815008104 + 69815008105.

It is an arithmetic number, because the mean of its divisors is an integer number (69815008105).

Almost surely, 2^139630016209 is an apocalyptic number.

It is an amenable number.

139630016209 is a deficient number, since it is larger than the sum of its proper divisors (1).

139630016209 is an equidigital number, since it uses as much as digits as its factorization.

139630016209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52488, while the sum is 40.

The spelling of 139630016209 in words is "one hundred thirty-nine billion, six hundred thirty million, sixteen thousand, two hundred nine".