149594197 has 4 divisors (see below), whose sum is σ = 149618700. Its totient is φ = 149569696.

The previous prime is 149594191. The next prime is 149594227. The reversal of 149594197 is 791495941.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 791495941 = 23 ⋅34412867.

It can be written as a sum of positive squares in 2 ways, for example, as 84162276 + 65431921 = 9174^2 + 8089^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-149594197 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 149594197.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149594191) 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, 5073 + ... + 18025.

It is an arithmetic number, because the mean of its divisors is an integer number (37404675).

Almost surely, 2^149594197 is an apocalyptic number.

It is an amenable number.

149594197 is a deficient number, since it is larger than the sum of its proper divisors (24503).

149594197 is a wasteful number, since it uses less digits than its factorization.

149594197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24502.

The product of its digits is 408240, while the sum is 49.

The square root of 149594197 is about 12230.8706558446. The cubic root of 149594197 is about 530.8497073720.

The spelling of 149594197 in words is "one hundred forty-nine million, five hundred ninety-four thousand, one hundred ninety-seven".