197954479 has 2 divisors, whose sum is σ = 197954480. Its totient is φ = 197954478.

The previous prime is 197954467. The next prime is 197954513. The reversal of 197954479 is 974459791.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 197954479 - 2⁵ = 197954447 is a prime.

It is a super-2 number, since 2×197954479² = 78371951512322882, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197954429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98977239 + 98977240.

It is an arithmetic number, because the mean of its divisors is an integer number (98977240).

Almost surely, 2^197954479 is an apocalyptic number.

197954479 is a deficient number, since it is larger than the sum of its proper divisors (1).

197954479 is an equidigital number, since it uses as much as digits as its factorization.

197954479 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2857680, while the sum is 55.

The square root of 197954479 is about 14069.6296681896. The cubic root of 197954479 is about 582.8029985571.

The spelling of 197954479 in words is "one hundred ninety-seven million, nine hundred fifty-four thousand, four hundred seventy-nine".