139889946709 has 2 divisors, whose sum is σ = 139889946710. Its totient is φ = 139889946708.

The previous prime is 139889946689. The next prime is 139889946767. The reversal of 139889946709 is 907649988931.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 135854902225 + 4035044484 = 368585^2 + 63522^2 .

It is a cyclic number.

It is not a de Polignac number, because 139889946709 - 2¹⁵ = 139889913941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139889940709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69944973354 + 69944973355.

It is an arithmetic number, because the mean of its divisors is an integer number (69944973355).

Almost surely, 2^139889946709 is an apocalyptic number.

It is an amenable number.

139889946709 is a deficient number, since it is larger than the sum of its proper divisors (1).

139889946709 is an equidigital number, since it uses as much as digits as its factorization.

139889946709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 211631616, while the sum is 73.

The spelling of 139889946709 in words is "one hundred thirty-nine billion, eight hundred eighty-nine million, nine hundred forty-six thousand, seven hundred nine".