139641527797 has 2 divisors, whose sum is σ = 139641527798. Its totient is φ = 139641527796.

The previous prime is 139641527783. The next prime is 139641527801. The reversal of 139641527797 is 797725146931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83013710641 + 56627817156 = 288121^2 + 237966^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139641527797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139641527897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69820763898 + 69820763899.

It is an arithmetic number, because the mean of its divisors is an integer number (69820763899).

Almost surely, 2^139641527797 is an apocalyptic number.

It is an amenable number.

139641527797 is a deficient number, since it is larger than the sum of its proper divisors (1).

139641527797 is an equidigital number, since it uses as much as digits as its factorization.

139641527797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20003760, while the sum is 61.

The spelling of 139641527797 in words is "one hundred thirty-nine billion, six hundred forty-one million, five hundred twenty-seven thousand, seven hundred ninety-seven".