194071381 has 4 divisors (see below), whose sum is σ = 221795872. Its totient is φ = 166346892.

The previous prime is 194071379. The next prime is 194071403. The reversal of 194071381 is 183170491.

194071381 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 not a de Polignac number, because 194071381 - 2¹ = 194071379 is a prime.

It is a super-2 number, since 2×194071381² = 75327401846494322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194071351) 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, 13862235 + ... + 13862248.

It is an arithmetic number, because the mean of its divisors is an integer number (55448968).

Almost surely, 2^194071381 is an apocalyptic number.

It is an amenable number.

194071381 is a deficient number, since it is larger than the sum of its proper divisors (27724491).

194071381 is an equidigital number, since it uses as much as digits as its factorization.

194071381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27724490.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 194071381 is about 13930.9504700864. The cubic root of 194071381 is about 578.9670288059.

The spelling of 194071381 in words is "one hundred ninety-four million, seventy-one thousand, three hundred eighty-one".