195654409 has 4 divisors (see below), whose sum is σ = 200942404. Its totient is φ = 190366416.

The previous prime is 195654391. The next prime is 195654413. The reversal of 195654409 is 904456591.

195654409 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 an emirpimes, since its reverse is a distinct semiprime: 904456591 = 379 ⋅2386429.

It can be written as a sum of positive squares in 2 ways, for example, as 157251600 + 38402809 = 12540^2 + 6197^2 .

It is a cyclic number.

It is not a de Polignac number, because 195654409 - 2⁷ = 195654281 is a prime.

It is a super-2 number, since 2×195654409² = 76561295522278562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (195654439) 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, 2643942 + ... + 2644015.

It is an arithmetic number, because the mean of its divisors is an integer number (50235601).

Almost surely, 2^195654409 is an apocalyptic number.

It is an amenable number.

195654409 is a deficient number, since it is larger than the sum of its proper divisors (5287995).

195654409 is an equidigital number, since it uses as much as digits as its factorization.

195654409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5287994.

The product of its (nonzero) digits is 194400, while the sum is 43.

The square root of 195654409 is about 13987.6520188343. The cubic root of 195654409 is about 580.5369670479.

It can be divided in two parts, 1956 and 54409, that added together give a palindrome (56365).

The spelling of 195654409 in words is "one hundred ninety-five million, six hundred fifty-four thousand, four hundred nine".