195894451 has 8 divisors (see below), whose sum is σ = 207751824. Its totient is φ = 184074240.

The previous prime is 195894431. The next prime is 195894463. The reversal of 195894451 is 154498591.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 195894451 - 2¹⁹ = 195370163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (195894431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1971 + ... + 19891.

It is an arithmetic number, because the mean of its divisors is an integer number (25968978).

Almost surely, 2^195894451 is an apocalyptic number.

195894451 is a deficient number, since it is larger than the sum of its proper divisors (11857373).

195894451 is a wasteful number, since it uses less digits than its factorization.

195894451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18581.

The product of its digits is 259200, while the sum is 46.

The square root of 195894451 is about 13996.2298852227. The cubic root of 195894451 is about 580.7742839661.

The spelling of 195894451 in words is "one hundred ninety-five million, eight hundred ninety-four thousand, four hundred fifty-one".