138701670031 has 2 divisors, whose sum is σ = 138701670032. Its totient is φ = 138701670030.

The previous prime is 138701670011. The next prime is 138701670047. The reversal of 138701670031 is 130076107831.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138701670031 is a prime.

It is a super-2 number, since 2×138701670031² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138701670011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69350835015 + 69350835016.

It is an arithmetic number, because the mean of its divisors is an integer number (69350835016).

Almost surely, 2^138701670031 is an apocalyptic number.

138701670031 is a deficient number, since it is larger than the sum of its proper divisors (1).

138701670031 is an equidigital number, since it uses as much as digits as its factorization.

138701670031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 37.

Adding to 138701670031 its reverse (130076107831), we get a palindrome (268777777862).

The spelling of 138701670031 in words is "one hundred thirty-eight billion, seven hundred one million, six hundred seventy thousand, thirty-one".