139996223 has 4 divisors (see below), whose sum is σ = 140019888. Its totient is φ = 139972560.

The previous prime is 139996211. The next prime is 139996229. The reversal of 139996223 is 322699931.

It is a Cunningham number, because it is equal to 11832²-1.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 322699931 = 73 ⋅4420547.

It is a cyclic number.

It is not a de Polignac number, because 139996223 - 2²⁶ = 72887359 is a prime.

It is a super-3 number, since 3×139996223³ (a number of 25 digits) contains 333 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 (139996229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5915 + ... + 17747.

It is an arithmetic number, because the mean of its divisors is an integer number (35004972).

Almost surely, 2^139996223 is an apocalyptic number.

139996223 is a deficient number, since it is larger than the sum of its proper divisors (23665).

139996223 is a wasteful number, since it uses less digits than its factorization.

139996223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23664.

The product of its digits is 157464, while the sum is 44.

The square root of 139996223 is about 11831.9999577417. Note that the first 4 decimals coincide. The cubic root of 139996223 is about 519.2447406073.

The spelling of 139996223 in words is "one hundred thirty-nine million, nine hundred ninety-six thousand, two hundred twenty-three".