139061173 has 8 divisors (see below), whose sum is σ = 147664728. Its totient is φ = 130504704.

The previous prime is 139061149. The next prime is 139061189. The reversal of 139061173 is 371160931.

It can be written as a sum of positive squares in 4 ways, for example, as 3175524 + 135885649 = 1782^2 + 11657^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 139061173 - 2⁵ = 139061141 is a prime.

It is a super-2 number, since 2×139061173² = 38676019672271858, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139061123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5586 + ... + 17587.

It is an arithmetic number, because the mean of its divisors is an integer number (18458091).

Almost surely, 2^139061173 is an apocalyptic number.

It is an amenable number.

139061173 is a deficient number, since it is larger than the sum of its proper divisors (8603555).

139061173 is a wasteful number, since it uses less digits than its factorization.

139061173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23543.

The product of its (nonzero) digits is 3402, while the sum is 31.

The square root of 139061173 is about 11792.4201502491. The cubic root of 139061173 is about 518.0861265636.

The spelling of 139061173 in words is "one hundred thirty-nine million, sixty-one thousand, one hundred seventy-three".