195890237 has 2 divisors, whose sum is σ = 195890238. Its totient is φ = 195890236.

The previous prime is 195890231. The next prime is 195890243. The reversal of 195890237 is 732098591.

It is a balanced prime because it is at equal distance from previous prime (195890231) and next prime (195890243).

It can be written as a sum of positive squares in only one way, i.e., 138039001 + 57851236 = 11749^2 + 7606^2 .

It is a cyclic number.

It is not a de Polignac number, because 195890237 - 2⁴ = 195890221 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195890231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97945118 + 97945119.

It is an arithmetic number, because the mean of its divisors is an integer number (97945119).

Almost surely, 2^195890237 is an apocalyptic number.

It is an amenable number.

195890237 is a deficient number, since it is larger than the sum of its proper divisors (1).

195890237 is an equidigital number, since it uses as much as digits as its factorization.

195890237 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 136080, while the sum is 44.

The square root of 195890237 is about 13996.0793438734. The cubic root of 195890237 is about 580.7701194779.

The spelling of 195890237 in words is "one hundred ninety-five million, eight hundred ninety thousand, two hundred thirty-seven".