797161639 has 2 divisors, whose sum is σ = 797161640. Its totient is φ = 797161638.

The previous prime is 797161627. The next prime is 797161667. The reversal of 797161639 is 936161797.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 797161639 - 2²⁹ = 260290727 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 797161592 and 797161601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (797161609) 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, 398580819 + 398580820.

It is an arithmetic number, because the mean of its divisors is an integer number (398580820).

Almost surely, 2^797161639 is an apocalyptic number.

797161639 is a deficient number, since it is larger than the sum of its proper divisors (1).

797161639 is an equidigital number, since it uses as much as digits as its factorization.

797161639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 428652, while the sum is 49.

The square root of 797161639 is about 28234.0510554189. The cubic root of 797161639 is about 927.2185903608.

The spelling of 797161639 in words is "seven hundred ninety-seven million, one hundred sixty-one thousand, six hundred thirty-nine".