138841192997 has 8 divisors (see below), whose sum is σ = 149876448120. Its totient is φ = 127856675520.

The previous prime is 138841192967. The next prime is 138841193041. The reversal of 138841192997 is 799291148831.

It is a Cunningham number, because it is equal to 372614²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 658743556 + 138182449441 = 25666^2 + 371729^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 138841192997 - 2²⁸ = 138572757541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138841192907) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12678722 + ... + 12689667.

It is an arithmetic number, because the mean of its divisors is an integer number (18734556015).

Almost surely, 2^138841192997 is an apocalyptic number.

It is an amenable number.

138841192997 is a deficient number, since it is larger than the sum of its proper divisors (11035255123).

138841192997 is a wasteful number, since it uses less digits than its factorization.

138841192997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25368823.

The product of its digits is 7838208, while the sum is 62.

The spelling of 138841192997 in words is "one hundred thirty-eight billion, eight hundred forty-one million, one hundred ninety-two thousand, nine hundred ninety-seven".