139336421 has 8 divisors (see below), whose sum is σ = 159957504. Its totient is φ = 118894320.

The previous prime is 139336411. The next prime is 139336423. The reversal of 139336421 is 124633931.

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 139336421 - 2¹⁰ = 139335397 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139336423) 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 7 ways as a sum of consecutive naturals, for example, 43070 + ... + 46191.

It is an arithmetic number, because the mean of its divisors is an integer number (19994688).

Almost surely, 2^139336421 is an apocalyptic number.

It is an amenable number.

139336421 is a deficient number, since it is larger than the sum of its proper divisors (20621083).

139336421 is an equidigital number, since it uses as much as digits as its factorization.

139336421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89491.

The product of its digits is 11664, while the sum is 32.

The square root of 139336421 is about 11804.0849285322. The cubic root of 139336421 is about 518.4277224833.

The spelling of 139336421 in words is "one hundred thirty-nine million, three hundred thirty-six thousand, four hundred twenty-one".