197662513 has 2 divisors, whose sum is σ = 197662514. Its totient is φ = 197662512.

The previous prime is 197662501. The next prime is 197662559. The reversal of 197662513 is 315266791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128323584 + 69338929 = 11328^2 + 8327^2 .

It is a cyclic number.

It is not a de Polignac number, because 197662513 - 2⁵ = 197662481 is a prime.

It is not a weakly prime, because it can be changed into another prime (197662573) 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, 98831256 + 98831257.

It is an arithmetic number, because the mean of its divisors is an integer number (98831257).

Almost surely, 2^197662513 is an apocalyptic number.

It is an amenable number.

197662513 is a deficient number, since it is larger than the sum of its proper divisors (1).

197662513 is an equidigital number, since it uses as much as digits as its factorization.

197662513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68040, while the sum is 40.

The square root of 197662513 is about 14059.2500866867. The cubic root of 197662513 is about 582.5163293082.

The spelling of 197662513 in words is "one hundred ninety-seven million, six hundred sixty-two thousand, five hundred thirteen".