138391702 has 8 divisors (see below), whose sum is σ = 208747800. Its totient is φ = 68809104.

The previous prime is 138391681. The next prime is 138391703. The reversal of 138391702 is 207193831.

138391702 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138391703) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 192927 + ... + 193642.

It is an arithmetic number, because the mean of its divisors is an integer number (26093475).

Almost surely, 2^138391702 is an apocalyptic number.

138391702 is a deficient number, since it is larger than the sum of its proper divisors (70356098).

138391702 is a wasteful number, since it uses less digits than its factorization.

138391702 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386750.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 138391702 is about 11764.0002550153. Note that the first 3 decimals coincide. The cubic root of 138391702 is about 517.2533953826.

The spelling of 138391702 in words is "one hundred thirty-eight million, three hundred ninety-one thousand, seven hundred two".