194725881 has 12 divisors (see below), whose sum is σ = 321452352. Its totient is φ = 111271896.

The previous prime is 194725877. The next prime is 194725897. The reversal of 194725881 is 188527491.

It is not a de Polignac number, because 194725881 - 2² = 194725877 is a prime.

It is a super-2 number, since 2×194725881² = 75836337462452322, which contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (194715881) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1545381 + ... + 1545506.

It is an arithmetic number, because the mean of its divisors is an integer number (26787696).

Almost surely, 2^194725881 is an apocalyptic number.

It is an amenable number.

194725881 is a deficient number, since it is larger than the sum of its proper divisors (126726471).

194725881 is a wasteful number, since it uses less digits than its factorization.

194725881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3090900 (or 3090897 counting only the distinct ones).

The product of its digits is 161280, while the sum is 45.

The square root of 194725881 is about 13954.4215573416. The cubic root of 194725881 is about 579.6171482509.

The spelling of 194725881 in words is "one hundred ninety-four million, seven hundred twenty-five thousand, eight hundred eighty-one".