197652979 has 2 divisors, whose sum is σ = 197652980. Its totient is φ = 197652978.

The previous prime is 197652977. The next prime is 197652989. The reversal of 197652979 is 979256791.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 197652979 - 2¹ = 197652977 is a prime.

Together with 197652977, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (197652977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98826489 + 98826490.

It is an arithmetic number, because the mean of its divisors is an integer number (98826490).

Almost surely, 2^197652979 is an apocalyptic number.

197652979 is a deficient number, since it is larger than the sum of its proper divisors (1).

197652979 is an equidigital number, since it uses as much as digits as its factorization.

197652979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2143260, while the sum is 55.

The square root of 197652979 is about 14058.9110175717. The cubic root of 197652979 is about 582.5069635128.

The spelling of 197652979 in words is "one hundred ninety-seven million, six hundred fifty-two thousand, nine hundred seventy-nine".