139794365989 has 2 divisors, whose sum is σ = 139794365990. Its totient is φ = 139794365988.

The previous prime is 139794365873. The next prime is 139794366053. The reversal of 139794365989 is 989563497931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 137600193025 + 2194172964 = 370945^2 + 46842^2 .

It is a cyclic number.

It is not a de Polignac number, because 139794365989 - 2²⁵ = 139760811557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139794360989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69897182994 + 69897182995.

It is an arithmetic number, because the mean of its divisors is an integer number (69897182995).

Almost surely, 2^139794365989 is an apocalyptic number.

It is an amenable number.

139794365989 is a deficient number, since it is larger than the sum of its proper divisors (1).

139794365989 is an equidigital number, since it uses as much as digits as its factorization.

139794365989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 396809280, while the sum is 73.

The spelling of 139794365989 in words is "one hundred thirty-nine billion, seven hundred ninety-four million, three hundred sixty-five thousand, nine hundred eighty-nine".