197954513 has 2 divisors, whose sum is σ = 197954514. Its totient is φ = 197954512.

The previous prime is 197954479. The next prime is 197954527. The reversal of 197954513 is 315459791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 150234049 + 47720464 = 12257^2 + 6908^2 .

It is a cyclic number.

It is not a de Polignac number, because 197954513 - 2¹⁰ = 197953489 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (197954563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98977256 + 98977257.

It is an arithmetic number, because the mean of its divisors is an integer number (98977257).

Almost surely, 2^197954513 is an apocalyptic number.

It is an amenable number.

197954513 is a deficient number, since it is larger than the sum of its proper divisors (1).

197954513 is an equidigital number, since it uses as much as digits as its factorization.

197954513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 170100, while the sum is 44.

The square root of 197954513 is about 14069.6308764658. The cubic root of 197954513 is about 582.8030319239.

The spelling of 197954513 in words is "one hundred ninety-seven million, nine hundred fifty-four thousand, five hundred thirteen".