799919731381 has 2 divisors, whose sum is σ = 799919731382. Its totient is φ = 799919731380.

The previous prime is 799919731361. The next prime is 799919731537. The reversal of 799919731381 is 183137919997.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 419212221156 + 380707510225 = 647466^2 + 617015^2 .

It is a cyclic number.

It is not a de Polignac number, because 799919731381 - 2¹³ = 799919723189 is a prime.

It is a super-2 number, since 2×799919731381² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (799919731361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 399959865690 + 399959865691.

It is an arithmetic number, because the mean of its divisors is an integer number (399959865691).

Almost surely, 2^799919731381 is an apocalyptic number.

It is an amenable number.

799919731381 is a deficient number, since it is larger than the sum of its proper divisors (1).

799919731381 is an equidigital number, since it uses as much as digits as its factorization.

799919731381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23147208, while the sum is 67.

The spelling of 799919731381 in words is "seven hundred ninety-nine billion, nine hundred nineteen million, seven hundred thirty-one thousand, three hundred eighty-one".