197219993 has 2 divisors, whose sum is σ = 197219994. Its totient is φ = 197219992.

The previous prime is 197219989. The next prime is 197220007. The reversal of 197219993 is 399912791.

197219993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 149499529 + 47720464 = 12227^2 + 6908^2 .

It is a cyclic number.

It is not a de Polignac number, because 197219993 - 2² = 197219989 is a prime.

It is not a weakly prime, because it can be changed into another prime (197219983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98609996 + 98609997.

It is an arithmetic number, because the mean of its divisors is an integer number (98609997).

Almost surely, 2^197219993 is an apocalyptic number.

It is an amenable number.

197219993 is a deficient number, since it is larger than the sum of its proper divisors (1).

197219993 is an equidigital number, since it uses as much as digits as its factorization.

197219993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 275562, while the sum is 50.

The square root of 197219993 is about 14043.5035870683. The cubic root of 197219993 is about 582.0812986968.

The spelling of 197219993 in words is "one hundred ninety-seven million, two hundred nineteen thousand, nine hundred ninety-three".