139865223 has 8 divisors (see below), whose sum is σ = 189648000. Its totient is φ = 91662968.

The previous prime is 139865207. The next prime is 139865233. The reversal of 139865223 is 322568931.

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 139865223 - 2⁴ = 139865207 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139865233) 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, 394923 + ... + 395276.

It is an arithmetic number, because the mean of its divisors is an integer number (23706000).

Almost surely, 2^139865223 is an apocalyptic number.

139865223 is a deficient number, since it is larger than the sum of its proper divisors (49782777).

139865223 is an equidigital number, since it uses as much as digits as its factorization.

139865223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790261.

The product of its digits is 77760, while the sum is 39.

The square root of 139865223 is about 11826.4628270671. The cubic root of 139865223 is about 519.0827307872.

The spelling of 139865223 in words is "one hundred thirty-nine million, eight hundred sixty-five thousand, two hundred twenty-three".