195791437 has 2 divisors, whose sum is σ = 195791438. Its totient is φ = 195791436.

The previous prime is 195791419. The next prime is 195791459. The reversal of 195791437 is 734197591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128731716 + 67059721 = 11346^2 + 8189^2 .

It is a cyclic number.

It is not a de Polignac number, because 195791437 - 2²³ = 187402829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195791417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97895718 + 97895719.

It is an arithmetic number, because the mean of its divisors is an integer number (97895719).

Almost surely, 2^195791437 is an apocalyptic number.

It is an amenable number.

195791437 is a deficient number, since it is larger than the sum of its proper divisors (1).

195791437 is an equidigital number, since it uses as much as digits as its factorization.

195791437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 238140, while the sum is 46.

The square root of 195791437 is about 13992.5493388446. The cubic root of 195791437 is about 580.6724631948.

The spelling of 195791437 in words is "one hundred ninety-five million, seven hundred ninety-one thousand, four hundred thirty-seven".