197376989 has 4 divisors (see below), whose sum is σ = 197713824. Its totient is φ = 197040156.

The previous prime is 197376979. The next prime is 197377003. The reversal of 197376989 is 989673791.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 197376989 - 2¹⁶ = 197311453 is a prime.

It is a super-2 number, since 2×197376989² = 77915351573412242, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197376979) 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 in 3 ways as a sum of consecutive naturals, for example, 167537 + ... + 168710.

It is an arithmetic number, because the mean of its divisors is an integer number (49428456).

Almost surely, 2^197376989 is an apocalyptic number.

It is an amenable number.

197376989 is a deficient number, since it is larger than the sum of its proper divisors (336835).

197376989 is an equidigital number, since it uses as much as digits as its factorization.

197376989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336834.

The product of its digits is 5143824, while the sum is 59.

The square root of 197376989 is about 14049.0921058978. The cubic root of 197376989 is about 582.2357120437.

The spelling of 197376989 in words is "one hundred ninety-seven million, three hundred seventy-six thousand, nine hundred eighty-nine".