139214473 has 4 divisors (see below), whose sum is σ = 140491780. Its totient is φ = 137937168.

The previous prime is 139214447. The next prime is 139214483. The reversal of 139214473 is 374412931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 374412931 = 103 ⋅3635077.

It can be written as a sum of positive squares in 2 ways, for example, as 74701449 + 64513024 = 8643^2 + 8032^2 .

It is a cyclic number.

It is not a de Polignac number, because 139214473 - 2⁹ = 139213961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139214443) 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, 638490 + ... + 638707.

It is an arithmetic number, because the mean of its divisors is an integer number (35122945).

Almost surely, 2^139214473 is an apocalyptic number.

It is an amenable number.

139214473 is a deficient number, since it is larger than the sum of its proper divisors (1277307).

139214473 is a wasteful number, since it uses less digits than its factorization.

139214473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1277306.

The product of its digits is 18144, while the sum is 34.

The square root of 139214473 is about 11798.9182978780. The cubic root of 139214473 is about 518.2764347433.

The spelling of 139214473 in words is "one hundred thirty-nine million, two hundred fourteen thousand, four hundred seventy-three".