190268861 has 2 divisors, whose sum is σ = 190268862. Its totient is φ = 190268860.

The previous prime is 190268843. The next prime is 190268891. The reversal of 190268861 is 168862091.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 132963961 + 57304900 = 11531^2 + 7570^2 .

It is a cyclic number.

It is not a de Polignac number, because 190268861 - 2²² = 186074557 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 (190268801) 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, 95134430 + 95134431.

It is an arithmetic number, because the mean of its divisors is an integer number (95134431).

Almost surely, 2^190268861 is an apocalyptic number.

It is an amenable number.

190268861 is a deficient number, since it is larger than the sum of its proper divisors (1).

190268861 is an equidigital number, since it uses as much as digits as its factorization.

190268861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 41.

The square root of 190268861 is about 13793.7979179050. The cubic root of 190268861 is about 575.1607474957.

The spelling of 190268861 in words is "one hundred ninety million, two hundred sixty-eight thousand, eight hundred sixty-one".