797421137 has 2 divisors, whose sum is σ = 797421138. Its totient is φ = 797421136.

The previous prime is 797421133. The next prime is 797421169. The reversal of 797421137 is 731124797.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 591900241 + 205520896 = 24329^2 + 14336^2 .

It is a cyclic number.

It is not a de Polignac number, because 797421137 - 2² = 797421133 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 797421094 and 797421103.

It is not a weakly prime, because it can be changed into another prime (797421133) 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, 398710568 + 398710569.

It is an arithmetic number, because the mean of its divisors is an integer number (398710569).

Almost surely, 2^797421137 is an apocalyptic number.

It is an amenable number.

797421137 is a deficient number, since it is larger than the sum of its proper divisors (1).

797421137 is an equidigital number, since it uses as much as digits as its factorization.

797421137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 74088, while the sum is 41.

The square root of 797421137 is about 28238.6461608909. The cubic root of 797421137 is about 927.3191911483.

The spelling of 797421137 in words is "seven hundred ninety-seven million, four hundred twenty-one thousand, one hundred thirty-seven".