194494861 has 4 divisors (see below), whose sum is σ = 212176224. Its totient is φ = 176813500.

The previous prime is 194494823. The next prime is 194494871. The reversal of 194494861 is 168494491.

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, and also an emirpimes, since its reverse is a distinct semiprime: 168494491 = 11 ⋅15317681.

It is a cyclic number.

It is not a de Polignac number, because 194494861 - 2¹¹ = 194492813 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 (194494871) 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, 8840665 + ... + 8840686.

It is an arithmetic number, because the mean of its divisors is an integer number (53044056).

Almost surely, 2^194494861 is an apocalyptic number.

194494861 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

194494861 is a deficient number, since it is larger than the sum of its proper divisors (17681363).

194494861 is a wasteful number, since it uses less digits than its factorization.

194494861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17681362.

The product of its digits is 248832, while the sum is 46.

The square root of 194494861 is about 13946.1414376881. The cubic root of 194494861 is about 579.3878410466.

It can be divided in two parts, 19449 and 4861, that added together give a triangular number (24310 = T₂₂₀).

The spelling of 194494861 in words is "one hundred ninety-four million, four hundred ninety-four thousand, eight hundred sixty-one".