149000197 has 2 divisors, whose sum is σ = 149000198. Its totient is φ = 149000196.

The previous prime is 149000177. The next prime is 149000213. The reversal of 149000197 is 791000941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 147233956 + 1766241 = 12134^2 + 1329^2 .

It is an emirp because it is prime and its reverse (791000941) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-149000197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149000107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74500098 + 74500099.

It is an arithmetic number, because the mean of its divisors is an integer number (74500099).

Almost surely, 2^149000197 is an apocalyptic number.

It is an amenable number.

149000197 is a deficient number, since it is larger than the sum of its proper divisors (1).

149000197 is an equidigital number, since it uses as much as digits as its factorization.

149000197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 31.

The square root of 149000197 is about 12206.5636851655. The cubic root of 149000197 is about 530.1461528817.

The spelling of 149000197 in words is "one hundred forty-nine million, one hundred ninety-seven", and thus it is an aban number.