139793873 has 4 divisors (see below), whose sum is σ = 148017060. Its totient is φ = 131570688.

The previous prime is 139793831. The next prime is 139793879. The reversal of 139793873 is 378397931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 378397931 = 191 ⋅1981141.

It can be written as a sum of positive squares in 2 ways, for example, as 47018449 + 92775424 = 6857^2 + 9632^2 .

It is a cyclic number.

It is not a de Polignac number, because 139793873 - 2²⁰ = 138745297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139793879) 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, 4111568 + ... + 4111601.

It is an arithmetic number, because the mean of its divisors is an integer number (37004265).

Almost surely, 2^139793873 is an apocalyptic number.

It is an amenable number.

139793873 is a deficient number, since it is larger than the sum of its proper divisors (8223187).

139793873 is an equidigital number, since it uses as much as digits as its factorization.

139793873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8223186.

The product of its digits is 857304, while the sum is 50.

The square root of 139793873 is about 11823.4459021049. The cubic root of 139793873 is about 518.9944485307.

The spelling of 139793873 in words is "one hundred thirty-nine million, seven hundred ninety-three thousand, eight hundred seventy-three".