195640441 has 2 divisors, whose sum is σ = 195640442. Its totient is φ = 195640440.

The previous prime is 195640439. The next prime is 195640451. The reversal of 195640441 is 144046591.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 154629225 + 41011216 = 12435^2 + 6404^2 .

It is a cyclic number.

It is not a de Polignac number, because 195640441 - 2¹ = 195640439 is a prime.

Together with 195640439, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 195640397 and 195640406.

It is not a weakly prime, because it can be changed into another prime (195640421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97820220 + 97820221.

It is an arithmetic number, because the mean of its divisors is an integer number (97820221).

Almost surely, 2^195640441 is an apocalyptic number.

It is an amenable number.

195640441 is a deficient number, since it is larger than the sum of its proper divisors (1).

195640441 is an equidigital number, since it uses as much as digits as its factorization.

195640441 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 195640441 is about 13987.1527124000. The cubic root of 195640441 is about 580.5231516452.

The spelling of 195640441 in words is "one hundred ninety-five million, six hundred forty thousand, four hundred forty-one".