798521197 has 2 divisors, whose sum is σ = 798521198. Its totient is φ = 798521196.

The previous prime is 798521183. The next prime is 798521201. The reversal of 798521197 is 791125897.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 632472201 + 166048996 = 25149^2 + 12886^2 .

It is a cyclic number.

It is not a de Polignac number, because 798521197 - 2¹¹ = 798519149 is a prime.

It is a super-2 number, since 2×798521197² = 1275272204116625618, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 798521197.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (798521147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 399260598 + 399260599.

It is an arithmetic number, because the mean of its divisors is an integer number (399260599).

Almost surely, 2^798521197 is an apocalyptic number.

It is an amenable number.

798521197 is a deficient number, since it is larger than the sum of its proper divisors (1).

798521197 is an equidigital number, since it uses as much as digits as its factorization.

798521197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 317520, while the sum is 49.

The square root of 798521197 is about 28258.1173647503. The cubic root of 798521197 is about 927.7454142880.

The spelling of 798521197 in words is "seven hundred ninety-eight million, five hundred twenty-one thousand, one hundred ninety-seven".