139087173 has 8 divisors (see below), whose sum is σ = 191431936. Its totient is φ = 89733600.

The previous prime is 139087171. The next prime is 139087229. The reversal of 139087173 is 371780931.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 139087173 - 2¹ = 139087171 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 (139087171) 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 7 ways as a sum of consecutive naturals, for example, 747688 + ... + 747873.

It is an arithmetic number, because the mean of its divisors is an integer number (23928992).

Almost surely, 2^139087173 is an apocalyptic number.

It is an amenable number.

139087173 is a deficient number, since it is larger than the sum of its proper divisors (52344763).

139087173 is a wasteful number, since it uses less digits than its factorization.

139087173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1495595.

The product of its (nonzero) digits is 31752, while the sum is 39.

The square root of 139087173 is about 11793.5225017804. The cubic root of 139087173 is about 518.1184130736.

The spelling of 139087173 in words is "one hundred thirty-nine million, eighty-seven thousand, one hundred seventy-three".