180000197 has 8 divisors (see below), whose sum is σ = 194340216. Its totient is φ = 165730752.

The previous prime is 180000173. The next prime is 180000259. The reversal of 180000197 is 791000081.

It can be written as a sum of positive squares in 4 ways, for example, as 31013761 + 148986436 = 5569^2 + 12206^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 180000197 - 2⁶ = 180000133 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 (180000397) 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, 12278 + ... + 22599.

It is an arithmetic number, because the mean of its divisors is an integer number (24292527).

Almost surely, 2^180000197 is an apocalyptic number.

It is an amenable number.

180000197 is a deficient number, since it is larger than the sum of its proper divisors (14340019).

180000197 is a wasteful number, since it uses less digits than its factorization.

180000197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35287.

The product of its (nonzero) digits is 504, while the sum is 26.

The square root of 180000197 is about 13416.4152067533. The cubic root of 180000197 is about 564.6218233109.

The spelling of 180000197 in words is "one hundred eighty million, one hundred ninety-seven", and thus it is an aban number.