139667930 has 8 divisors (see below), whose sum is σ = 251402292. Its totient is φ = 55867168.

The previous prime is 139667881. The next prime is 139667939. The reversal of 139667930 is 39766931.

It is a happy number.

139667930 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 134954689 + 4713241 = 11617^2 + 2171^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (139667939) 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, 6983387 + ... + 6983406.

Almost surely, 2^139667930 is an apocalyptic number.

139667930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

139667930 is a deficient number, since it is larger than the sum of its proper divisors (111734362).

139667930 is a wasteful number, since it uses less digits than its factorization.

139667930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13966800.

The product of its (nonzero) digits is 183708, while the sum is 44.

The square root of 139667930 is about 11818.1187166148. The cubic root of 139667930 is about 518.8385443283.

Subtracting from 139667930 its reverse (39766931), we obtain a palindrome (99900999).

The spelling of 139667930 in words is "one hundred thirty-nine million, six hundred sixty-seven thousand, nine hundred thirty".