139412268689 has 2 divisors, whose sum is σ = 139412268690. Its totient is φ = 139412268688.

The previous prime is 139412268641. The next prime is 139412268739. The reversal of 139412268689 is 986862214931.

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., 99835145089 + 39577123600 = 315967^2 + 198940^2 .

It is a cyclic number.

It is not a de Polignac number, because 139412268689 - 2¹⁶ = 139412203153 is a prime.

It is a super-2 number, since 2×139412268689² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (139412261689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69706134344 + 69706134345.

It is an arithmetic number, because the mean of its divisors is an integer number (69706134345).

Almost surely, 2^139412268689 is an apocalyptic number.

It is an amenable number.

139412268689 is a deficient number, since it is larger than the sum of its proper divisors (1).

139412268689 is an equidigital number, since it uses as much as digits as its factorization.

139412268689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8957952, while the sum is 59.

The spelling of 139412268689 in words is "one hundred thirty-nine billion, four hundred twelve million, two hundred sixty-eight thousand, six hundred eighty-nine".