138713930 has 8 divisors (see below), whose sum is σ = 249685092. Its totient is φ = 55485568.

The previous prime is 138713929. The next prime is 138713957. The reversal of 138713930 is 39317831.

It can be written as a sum of positive squares in 2 ways, for example, as 122124601 + 16589329 = 11051^2 + 4073^2 .

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

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 3 ways as a sum of consecutive naturals, for example, 6935687 + ... + 6935706.

Almost surely, 2^138713930 is an apocalyptic number.

138713930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138713930 is a deficient number, since it is larger than the sum of its proper divisors (110971162).

138713930 is a wasteful number, since it uses less digits than its factorization.

138713930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13871400.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 138713930 is about 11777.6878036396. The cubic root of 138713930 is about 517.6545377733.

The spelling of 138713930 in words is "one hundred thirty-eight million, seven hundred thirteen thousand, nine hundred thirty".