197223937 has 2 divisors, whose sum is σ = 197223938. Its totient is φ = 197223936.

The previous prime is 197223889. The next prime is 197223941. The reversal of 197223937 is 739322791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 178249201 + 18974736 = 13351^2 + 4356^2 .

It is a cyclic number.

It is not a de Polignac number, because 197223937 - 2¹⁹ = 196699649 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 197223893 and 197223902.

It is not a weakly prime, because it can be changed into another prime (197223977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98611968 + 98611969.

It is an arithmetic number, because the mean of its divisors is an integer number (98611969).

Almost surely, 2^197223937 is an apocalyptic number.

It is an amenable number.

197223937 is a deficient number, since it is larger than the sum of its proper divisors (1).

197223937 is an equidigital number, since it uses as much as digits as its factorization.

197223937 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 142884, while the sum is 43.

The square root of 197223937 is about 14043.6440071657. The cubic root of 197223937 is about 582.0851788195.

The spelling of 197223937 in words is "one hundred ninety-seven million, two hundred twenty-three thousand, nine hundred thirty-seven".