194150643 has 4 divisors (see below), whose sum is σ = 258867528. Its totient is φ = 129433760.

The previous prime is 194150639. The next prime is 194150653. The reversal of 194150643 is 346051491.

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

It is a cyclic number.

It is not a de Polignac number, because 194150643 - 2² = 194150639 is a prime.

It is not an unprimeable number, because it can be changed into a prime (194150623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32358438 + ... + 32358443.

It is an arithmetic number, because the mean of its divisors is an integer number (64716882).

Almost surely, 2^194150643 is an apocalyptic number.

194150643 is a deficient number, since it is larger than the sum of its proper divisors (64716885).

194150643 is an equidigital number, since it uses as much as digits as its factorization.

194150643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64716884.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 194150643 is about 13933.7949963389. The cubic root of 194150643 is about 579.0458380193.

The spelling of 194150643 in words is "one hundred ninety-four million, one hundred fifty thousand, six hundred forty-three".