361000191 has 4 divisors (see below), whose sum is σ = 481333592. Its totient is φ = 240666792.

The previous prime is 361000187. The next prime is 361000193. The reversal of 361000191 is 191000163.

It is a happy number.

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

It is not a de Polignac number, because 361000191 - 2² = 361000187 is a prime.

It is a super-2 number, since 2×361000191² = 260642275804072962, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (361000193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60166696 + ... + 60166701.

It is an arithmetic number, because the mean of its divisors is an integer number (120333398).

Almost surely, 2^361000191 is an apocalyptic number.

361000191 is a deficient number, since it is larger than the sum of its proper divisors (120333401).

361000191 is a wasteful number, since it uses less digits than its factorization.

361000191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120333400.

The product of its (nonzero) digits is 162, while the sum is 21.

The square root of 361000191 is about 19000.0050263151. The cubic root of 361000191 is about 712.0368614664.

The spelling of 361000191 in words is "three hundred sixty-one million, one hundred ninety-one", and thus it is an aban number.