139203638 has 16 divisors (see below), whose sum is σ = 239639040. Its totient is φ = 59407656.

The previous prime is 139203637. The next prime is 139203641. The reversal of 139203638 is 836302931.

139203638 is nontrivially palindromic in base 13.

139203638 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 139203598 and 139203607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139203637) 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, 17456 + ... + 24147.

It is an arithmetic number, because the mean of its divisors is an integer number (14977440).

Almost surely, 2^139203638 is an apocalyptic number.

139203638 is a deficient number, since it is larger than the sum of its proper divisors (100435402).

139203638 is a wasteful number, since it uses less digits than its factorization.

139203638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41851.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 139203638 is about 11798.4591366839. The cubic root of 139203638 is about 518.2629886536.

The spelling of 139203638 in words is "one hundred thirty-nine million, two hundred three thousand, six hundred thirty-eight".