139699424 has 48 divisors (see below), whose sum is σ = 288344448. Its totient is φ = 66498432.

The previous prime is 139699411. The next prime is 139699451. The reversal of 139699424 is 424996931.

139699424 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 255119 + ... + 255665.

It is an arithmetic number, because the mean of its divisors is an integer number (6007176).

Almost surely, 2^139699424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139699424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144172224).

139699424 is an abundant number, since it is smaller than the sum of its proper divisors (148645024).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

139699424 is a wasteful number, since it uses less digits than its factorization.

139699424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 927 (or 919 counting only the distinct ones).

The product of its digits is 419904, while the sum is 47.

The square root of 139699424 is about 11819.4510870852. The cubic root of 139699424 is about 518.8775393767.

The spelling of 139699424 in words is "one hundred thirty-nine million, six hundred ninety-nine thousand, four hundred twenty-four".