194378377 has 4 divisors (see below), whose sum is σ = 194991876. Its totient is φ = 193764880.

The previous prime is 194378369. The next prime is 194378389. The reversal of 194378377 is 773873491.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9853321 + 184525056 = 3139^2 + 13584^2 .

It is a cyclic number.

It is not a de Polignac number, because 194378377 - 2³ = 194378369 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 194378377.

It is not an unprimeable number, because it can be changed into a prime (194378077) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 306274 + ... + 306907.

It is an arithmetic number, because the mean of its divisors is an integer number (48747969).

Almost surely, 2^194378377 is an apocalyptic number.

It is an amenable number.

194378377 is a deficient number, since it is larger than the sum of its proper divisors (613499).

194378377 is an equidigital number, since it uses as much as digits as its factorization.

194378377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613498.

The product of its digits is 889056, while the sum is 49.

The square root of 194378377 is about 13941.9646033118. The cubic root of 194378377 is about 579.2721518014.

The spelling of 194378377 in words is "one hundred ninety-four million, three hundred seventy-eight thousand, three hundred seventy-seven".