197864493 has 8 divisors (see below), whose sum is σ = 270949728. Its totient is φ = 128344464.

The previous prime is 197864489. The next prime is 197864497. The reversal of 197864493 is 394468791.

It is an interprime number because it is at equal distance from previous prime (197864489) and next prime (197864497).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 197864493 - 2² = 197864489 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197864497) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 891171 + ... + 891392.

It is an arithmetic number, because the mean of its divisors is an integer number (33868716).

Almost surely, 2^197864493 is an apocalyptic number.

It is an amenable number.

197864493 is a deficient number, since it is larger than the sum of its proper divisors (73085235).

197864493 is a wasteful number, since it uses less digits than its factorization.

197864493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1782603.

The product of its digits is 1306368, while the sum is 51.

The square root of 197864493 is about 14066.4314237834. The cubic root of 197864493 is about 582.7146751210.

Adding to 197864493 its product of digits (1306368), we get a triangular number (199170861 = T₁₉₉₅₈).

The spelling of 197864493 in words is "one hundred ninety-seven million, eight hundred sixty-four thousand, four hundred ninety-three".