195748381 has 2 divisors, whose sum is σ = 195748382. Its totient is φ = 195748380.

The previous prime is 195748379. The next prime is 195748411. The reversal of 195748381 is 183847591.

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., 109537156 + 86211225 = 10466^2 + 9285^2 .

It is a cyclic number.

It is not a de Polignac number, because 195748381 - 2¹ = 195748379 is a prime.

It is a super-2 number, since 2×195748381² = 76634857328242322, which contains 22 as substring.

Together with 195748379, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195748321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97874190 + 97874191.

It is an arithmetic number, because the mean of its divisors is an integer number (97874191).

Almost surely, 2^195748381 is an apocalyptic number.

It is an amenable number.

195748381 is a deficient number, since it is larger than the sum of its proper divisors (1).

195748381 is an equidigital number, since it uses as much as digits as its factorization.

195748381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 46.

The square root of 195748381 is about 13991.0107211738. The cubic root of 195748381 is about 580.6298953364.

Adding to 195748381 its product of digits (241920), we get a triangular number (195990301 = T₁₉₇₉₈).

The spelling of 195748381 in words is "one hundred ninety-five million, seven hundred forty-eight thousand, three hundred eighty-one".