197274989 has 4 divisors (see below), whose sum is σ = 197324700. Its totient is φ = 197225280.

The previous prime is 197274983. The next prime is 197275019. The reversal of 197274989 is 989472791.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2449225 + 194825764 = 1565^2 + 13958^2 .

It is a cyclic number.

It is not a de Polignac number, because 197274989 - 2²⁴ = 180497773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197274983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18332 + ... + 27029.

It is an arithmetic number, because the mean of its divisors is an integer number (49331175).

Almost surely, 2^197274989 is an apocalyptic number.

It is an amenable number.

197274989 is a deficient number, since it is larger than the sum of its proper divisors (49711).

197274989 is an equidigital number, since it uses as much as digits as its factorization.

197274989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49710.

The product of its digits is 2286144, while the sum is 56.

The square root of 197274989 is about 14045.4615089715. The cubic root of 197274989 is about 582.1353993105.

The spelling of 197274989 in words is "one hundred ninety-seven million, two hundred seventy-four thousand, nine hundred eighty-nine".