195628691 has 2 divisors, whose sum is σ = 195628692. Its totient is φ = 195628690.

The previous prime is 195628687. The next prime is 195628729. The reversal of 195628691 is 196826591.

It is a happy number.

195628691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 195628691 - 2² = 195628687 is a prime.

It is not a weakly prime, because it can be changed into another prime (195628681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97814345 + 97814346.

It is an arithmetic number, because the mean of its divisors is an integer number (97814346).

Almost surely, 2^195628691 is an apocalyptic number.

195628691 is a deficient number, since it is larger than the sum of its proper divisors (1).

195628691 is an equidigital number, since it uses as much as digits as its factorization.

195628691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 233280, while the sum is 47.

The square root of 195628691 is about 13986.7326777915. The cubic root of 195628691 is about 580.5115295021.

The spelling of 195628691 in words is "one hundred ninety-five million, six hundred twenty-eight thousand, six hundred ninety-one".