190666837 has 2 divisors, whose sum is σ = 190666838. Its totient is φ = 190666836.

The previous prime is 190666813. The next prime is 190666841. The reversal of 190666837 is 738666091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118178641 + 72488196 = 10871^2 + 8514^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-190666837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (190666867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95333418 + 95333419.

It is an arithmetic number, because the mean of its divisors is an integer number (95333419).

Almost surely, 2^190666837 is an apocalyptic number.

It is an amenable number.

190666837 is a deficient number, since it is larger than the sum of its proper divisors (1).

190666837 is an equidigital number, since it uses as much as digits as its factorization.

190666837 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326592, while the sum is 46.

The square root of 190666837 is about 13808.2162859654. The cubic root of 190666837 is about 575.5614800250.

The spelling of 190666837 in words is "one hundred ninety million, six hundred sixty-six thousand, eight hundred thirty-seven".