190655887 has 2 divisors, whose sum is σ = 190655888. Its totient is φ = 190655886.

The previous prime is 190655849. The next prime is 190655911. The reversal of 190655887 is 788556091.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-190655887 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 190655887.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (190655827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95327943 + 95327944.

It is an arithmetic number, because the mean of its divisors is an integer number (95327944).

Almost surely, 2^190655887 is an apocalyptic number.

190655887 is a deficient number, since it is larger than the sum of its proper divisors (1).

190655887 is an equidigital number, since it uses as much as digits as its factorization.

190655887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 604800, while the sum is 49.

The square root of 190655887 is about 13807.8197772132. The cubic root of 190655887 is about 575.5504616452.

The spelling of 190655887 in words is "one hundred ninety million, six hundred fifty-five thousand, eight hundred eighty-seven".