797621953 has 2 divisors, whose sum is σ = 797621954. Its totient is φ = 797621952.

The previous prime is 797621941. The next prime is 797621959. The reversal of 797621953 is 359126797.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 510217744 + 287404209 = 22588^2 + 16953^2 .

It is an emirp because it is prime and its reverse (359126797) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 797621953 - 2⁹ = 797621441 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 797621897 and 797621906.

It is not a weakly prime, because it can be changed into another prime (797621959) 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, 398810976 + 398810977.

It is an arithmetic number, because the mean of its divisors is an integer number (398810977).

Almost surely, 2^797621953 is an apocalyptic number.

It is an amenable number.

797621953 is a deficient number, since it is larger than the sum of its proper divisors (1).

797621953 is an equidigital number, since it uses as much as digits as its factorization.

797621953 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 714420, while the sum is 49.

The square root of 797621953 is about 28242.2016316009. The cubic root of 797621953 is about 927.3970274351.

It can be divided in two parts, 7976 and 21953, that added together give a square (29929 = 173²).

The spelling of 797621953 in words is "seven hundred ninety-seven million, six hundred twenty-one thousand, nine hundred fifty-three".