194129849 has 8 divisors (see below), whose sum is σ = 197433480. Its totient is φ = 190843776.

The previous prime is 194129839. The next prime is 194129869. The reversal of 194129849 is 948921491.

It can be written as a sum of positive squares in 4 ways, for example, as 24010000 + 170119849 = 4900^2 + 13043^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-194129849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (194129809) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18947 + ... + 27335.

It is an arithmetic number, because the mean of its divisors is an integer number (24679185).

Almost surely, 2^194129849 is an apocalyptic number.

It is an amenable number.

194129849 is a deficient number, since it is larger than the sum of its proper divisors (3303631).

194129849 is an equidigital number, since it uses as much as digits as its factorization.

194129849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8779.

The product of its digits is 186624, while the sum is 47.

The square root of 194129849 is about 13933.0488049099. The cubic root of 194129849 is about 579.0251648814.

The spelling of 194129849 in words is "one hundred ninety-four million, one hundred twenty-nine thousand, eight hundred forty-nine".