139095973 has 4 divisors (see below), whose sum is σ = 145143648. Its totient is φ = 133048300.

The previous prime is 139095967. The next prime is 139095997. The reversal of 139095973 is 379590931.

139095973 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 379590931 = 941 ⋅403391.

It is a cyclic number.

It is not a de Polignac number, because 139095973 - 2²¹ = 136998821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139095773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3023803 + ... + 3023848.

It is an arithmetic number, because the mean of its divisors is an integer number (36285912).

Almost surely, 2^139095973 is an apocalyptic number.

It is an amenable number.

139095973 is a deficient number, since it is larger than the sum of its proper divisors (6047675).

139095973 is an equidigital number, since it uses as much as digits as its factorization.

139095973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6047674.

The product of its (nonzero) digits is 229635, while the sum is 46.

The square root of 139095973 is about 11793.8955820373. The cubic root of 139095973 is about 518.1293399041.

The spelling of 139095973 in words is "one hundred thirty-nine million, ninety-five thousand, nine hundred seventy-three".