139393799 has 2 divisors, whose sum is σ = 139393800. Its totient is φ = 139393798.

The previous prime is 139393789. The next prime is 139393811. The reversal of 139393799 is 997393931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 139393799 - 2¹⁶ = 139328263 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 139393799.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139393739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69696899 + 69696900.

It is an arithmetic number, because the mean of its divisors is an integer number (69696900).

Almost surely, 2^139393799 is an apocalyptic number.

139393799 is a deficient number, since it is larger than the sum of its proper divisors (1).

139393799 is an equidigital number, since it uses as much as digits as its factorization.

139393799 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1240029, while the sum is 53.

The square root of 139393799 is about 11806.5151081934. The cubic root of 139393799 is about 518.4988746474.

The spelling of 139393799 in words is "one hundred thirty-nine million, three hundred ninety-three thousand, seven hundred ninety-nine".