139470173 has 4 divisors (see below), whose sum is σ = 139910460. Its totient is φ = 139029888.

The previous prime is 139470161. The next prime is 139470179. The reversal of 139470173 is 371074931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 371074931 = 467 ⋅794593.

It can be written as a sum of positive squares in 2 ways, for example, as 82119844 + 57350329 = 9062^2 + 7573^2 .

It is a cyclic number.

It is not a de Polignac number, because 139470173 - 2⁴ = 139470157 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 (139470179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219668 + ... + 220301.

It is an arithmetic number, because the mean of its divisors is an integer number (34977615).

Almost surely, 2^139470173 is an apocalyptic number.

It is an amenable number.

139470173 is a deficient number, since it is larger than the sum of its proper divisors (440287).

139470173 is an equidigital number, since it uses as much as digits as its factorization.

139470173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440286.

The product of its (nonzero) digits is 15876, while the sum is 35.

The square root of 139470173 is about 11809.7490659201. The cubic root of 139470173 is about 518.5935527064.

The spelling of 139470173 in words is "one hundred thirty-nine million, four hundred seventy thousand, one hundred seventy-three".