139000388 has 6 divisors (see below), whose sum is σ = 243250686. Its totient is φ = 69500192.

The previous prime is 139000343. The next prime is 139000391. The reversal of 139000388 is 883000931.

139000388 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 102252544 + 36747844 = 10112^2 + 6062^2 .

It is a super-2 number, since 2×139000388² = 38642215728301088, which contains 22 as substring.

139000388 is strictly pandigital in base 9.

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 as a sum of consecutive naturals, namely, 17375045 + ... + 17375052.

It is an arithmetic number, because the mean of its divisors is an integer number (40541781).

Almost surely, 2^139000388 is an apocalyptic number.

It is an amenable number.

139000388 is a deficient number, since it is larger than the sum of its proper divisors (104250298).

139000388 is a wasteful number, since it uses less digits than its factorization.

139000388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34750101 (or 34750099 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 139000388 is about 11789.8425774053. The cubic root of 139000388 is about 518.0106287230.

The spelling of 139000388 in words is "one hundred thirty-nine million, three hundred eighty-eight", and thus it is an aban number.