139172773 has 2 divisors, whose sum is σ = 139172774. Its totient is φ = 139172772.

The previous prime is 139172767. The next prime is 139172779. The reversal of 139172773 is 377271931.

139172773 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (139172767) and next prime (139172779).

It can be written as a sum of positive squares in only one way, i.e., 84309124 + 54863649 = 9182^2 + 7407^2 .

It is an emirp because it is prime and its reverse (377271931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 139172773 - 2⁵ = 139172741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139172779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69586386 + 69586387.

It is an arithmetic number, because the mean of its divisors is an integer number (69586387).

Almost surely, 2^139172773 is an apocalyptic number.

It is an amenable number.

139172773 is a deficient number, since it is larger than the sum of its proper divisors (1).

139172773 is an equidigital number, since it uses as much as digits as its factorization.

139172773 is an evil number, because the sum of its binary digits is even.

The product of its digits is 55566, while the sum is 40.

The square root of 139172773 is about 11797.1510543860. The cubic root of 139172773 is about 518.2246817775.

The spelling of 139172773 in words is "one hundred thirty-nine million, one hundred seventy-two thousand, seven hundred seventy-three".