197663537 has 2 divisors, whose sum is σ = 197663538. Its totient is φ = 197663536.

The previous prime is 197663513. The next prime is 197663551. The reversal of 197663537 is 735366791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 195748081 + 1915456 = 13991^2 + 1384^2 .

It is a cyclic number.

It is not a de Polignac number, because 197663537 - 2¹⁰ = 197662513 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 197663491 and 197663500.

It is not a weakly prime, because it can be changed into another prime (197663597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98831768 + 98831769.

It is an arithmetic number, because the mean of its divisors is an integer number (98831769).

Almost surely, 2^197663537 is an apocalyptic number.

It is an amenable number.

197663537 is a deficient number, since it is larger than the sum of its proper divisors (1).

197663537 is an equidigital number, since it uses as much as digits as its factorization.

197663537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 714420, while the sum is 47.

The square root of 197663537 is about 14059.2865039446. The cubic root of 197663537 is about 582.5173352243.

The spelling of 197663537 in words is "one hundred ninety-seven million, six hundred sixty-three thousand, five hundred thirty-seven".