138071297 has 32 divisors (see below), whose sum is σ = 181440000. Its totient is φ = 101956608.

The previous prime is 138071287. The next prime is 138071299. The reversal of 138071297 is 792170831.

It is a de Polignac number, because none of the positive numbers 2^k-138071297 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 138071297.

It is not an unprimeable number, because it can be changed into a prime (138071299) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 230204 + ... + 230802.

It is an arithmetic number, because the mean of its divisors is an integer number (5670000).

Almost surely, 2^138071297 is an apocalyptic number.

138071297 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

138071297 is a deficient number, since it is larger than the sum of its proper divisors (43368703).

138071297 is a wasteful number, since it uses less digits than its factorization.

138071297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 785.

The product of its (nonzero) digits is 21168, while the sum is 38.

The square root of 138071297 is about 11750.3743344627. The cubic root of 138071297 is about 516.8539045737.

The spelling of 138071297 in words is "one hundred thirty-eight million, seventy-one thousand, two hundred ninety-seven".