194869149 has 32 divisors (see below), whose sum is σ = 279936000. Its totient is φ = 120219264.

The previous prime is 194869139. The next prime is 194869177. The reversal of 194869149 is 941968491.

It is not a de Polignac number, because 194869149 - 2⁷ = 194869021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194869139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 542632 + ... + 542990.

It is an arithmetic number, because the mean of its divisors is an integer number (8748000).

Almost surely, 2^194869149 is an apocalyptic number.

194869149 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

194869149 is a deficient number, since it is larger than the sum of its proper divisors (85066851).

194869149 is a wasteful number, since it uses less digits than its factorization.

194869149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 577.

The product of its digits is 559872, while the sum is 51.

The square root of 194869149 is about 13959.5540401547. The cubic root of 194869149 is about 579.7592629542.

The spelling of 194869149 in words is "one hundred ninety-four million, eight hundred sixty-nine thousand, one hundred forty-nine".