14721821197 has 2 divisors, whose sum is σ = 14721821198. Its totient is φ = 14721821196.

The previous prime is 14721821173. The next prime is 14721821239. The reversal of 14721821197 is 79112812741.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9551348361 + 5170472836 = 97731^2 + 71906^2 .

It is a cyclic number.

It is not a de Polignac number, because 14721821197 - 2²³ = 14713432589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14721824197) 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, 7360910598 + 7360910599.

It is an arithmetic number, because the mean of its divisors is an integer number (7360910599).

Almost surely, 2^14721821197 is an apocalyptic number.

It is an amenable number.

14721821197 is a deficient number, since it is larger than the sum of its proper divisors (1).

14721821197 is an equidigital number, since it uses as much as digits as its factorization.

14721821197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56448, while the sum is 43.

The spelling of 14721821197 in words is "fourteen billion, seven hundred twenty-one million, eight hundred twenty-one thousand, one hundred ninety-seven".