194150789 has 12 divisors (see below), whose sum is σ = 227006604. Its totient is φ = 165561984.

The previous prime is 194150701. The next prime is 194150813. The reversal of 194150789 is 987051491.

It can be written as a sum of positive squares in 2 ways, for example, as 107474689 + 86676100 = 10367^2 + 9310^2 .

It is a de Polignac number, because none of the positive numbers 2^k-194150789 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 (194150689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 404 + ... + 19709.

It is an arithmetic number, because the mean of its divisors is an integer number (18917217).

Almost surely, 2^194150789 is an apocalyptic number.

It is an amenable number.

194150789 is a deficient number, since it is larger than the sum of its proper divisors (32855815).

194150789 is a wasteful number, since it uses less digits than its factorization.

194150789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20324 (or 20317 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 44.

The square root of 194150789 is about 13933.8002353988. The cubic root of 194150789 is about 579.0459831654.

The spelling of 194150789 in words is "one hundred ninety-four million, one hundred fifty thousand, seven hundred eighty-nine".