139652771 has 2 divisors, whose sum is σ = 139652772. Its totient is φ = 139652770.

The previous prime is 139652761. The next prime is 139652789. The reversal of 139652771 is 177256931.

139652771 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 an emirp because it is prime and its reverse (177256931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 139652771 - 2¹⁰ = 139651747 is a prime.

It is not a weakly prime, because it can be changed into another prime (139652701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69826385 + 69826386.

It is an arithmetic number, because the mean of its divisors is an integer number (69826386).

Almost surely, 2^139652771 is an apocalyptic number.

139652771 is a deficient number, since it is larger than the sum of its proper divisors (1).

139652771 is an equidigital number, since it uses as much as digits as its factorization.

139652771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 79380, while the sum is 41.

The square root of 139652771 is about 11817.4773534795. The cubic root of 139652771 is about 518.8197727605.

The spelling of 139652771 in words is "one hundred thirty-nine million, six hundred fifty-two thousand, seven hundred seventy-one".