195420737 has 2 divisors, whose sum is σ = 195420738. Its totient is φ = 195420736.

The previous prime is 195420713. The next prime is 195420739. The reversal of 195420737 is 737024591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 185940496 + 9480241 = 13636^2 + 3079^2 .

It is a cyclic number.

It is not a de Polignac number, because 195420737 - 2⁸ = 195420481 is a prime.

Together with 195420739, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 195420737.

It is not a weakly prime, because it can be changed into another prime (195420739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97710368 + 97710369.

It is an arithmetic number, because the mean of its divisors is an integer number (97710369).

Almost surely, 2^195420737 is an apocalyptic number.

It is an amenable number.

195420737 is a deficient number, since it is larger than the sum of its proper divisors (1).

195420737 is an equidigital number, since it uses as much as digits as its factorization.

195420737 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52920, while the sum is 38.

The square root of 195420737 is about 13979.2967276612. The cubic root of 195420737 is about 580.3057612950.

The spelling of 195420737 in words is "one hundred ninety-five million, four hundred twenty thousand, seven hundred thirty-seven".