194978841 has 4 divisors (see below), whose sum is σ = 259971792. Its totient is φ = 129985892.

The previous prime is 194978801. The next prime is 194978857. The reversal of 194978841 is 148879491.

194978841 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-194978841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (194978801) 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, 32496471 + ... + 32496476.

It is an arithmetic number, because the mean of its divisors is an integer number (64992948).

Almost surely, 2^194978841 is an apocalyptic number.

It is an amenable number.

194978841 is a deficient number, since it is larger than the sum of its proper divisors (64992951).

194978841 is an equidigital number, since it uses as much as digits as its factorization.

194978841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64992950.

The product of its digits is 580608, while the sum is 51.

The square root of 194978841 is about 13963.4824094851. The cubic root of 194978841 is about 579.8680248672.

The spelling of 194978841 in words is "one hundred ninety-four million, nine hundred seventy-eight thousand, eight hundred forty-one".