139645867 has 2 divisors, whose sum is σ = 139645868. Its totient is φ = 139645866.

The previous prime is 139645859. The next prime is 139645931. The reversal of 139645867 is 768546931.

139645867 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 139645867 - 2³ = 139645859 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 139645867.

It is not a weakly prime, because it can be changed into another prime (139645367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69822933 + 69822934.

It is an arithmetic number, because the mean of its divisors is an integer number (69822934).

Almost surely, 2^139645867 is an apocalyptic number.

139645867 is a deficient number, since it is larger than the sum of its proper divisors (1).

139645867 is an equidigital number, since it uses as much as digits as its factorization.

139645867 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1088640, while the sum is 49.

The square root of 139645867 is about 11817.1852401492. The cubic root of 139645867 is about 518.8112230059.

The spelling of 139645867 in words is "one hundred thirty-nine million, six hundred forty-five thousand, eight hundred sixty-seven".