139473 has 6 divisors (see below), whose sum is σ = 201474. Its totient is φ = 92976.

The previous prime is 139459. The next prime is 139483. The reversal of 139473 is 374931.

It can be written as a sum of positive squares in only one way, i.e., 138384 + 1089 = 372^2 + 33^2 .

It is not a de Polignac number, because 139473 - 2⁴ = 139457 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (139423) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7740 + ... + 7757.

It is an arithmetic number, because the mean of its divisors is an integer number (33579).

2¹³⁹⁴⁷³ is an apocalyptic number.

It is an amenable number.

139473 is a deficient number, since it is larger than the sum of its proper divisors (62001).

139473 is a wasteful number, since it uses less digits than its factorization.

139473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15503 (or 15500 counting only the distinct ones).

The product of its digits is 2268, while the sum is 27.

The square root of 139473 is about 373.4608413207. The cubic root of 139473 is about 51.8597056572.

The spelling of 139473 in words is "one hundred thirty-nine thousand, four hundred seventy-three".