199764077 has 2 divisors, whose sum is σ = 199764078. Its totient is φ = 199764076.

The previous prime is 199764067. The next prime is 199764101. The reversal of 199764077 is 770467991.

It is a happy number.

199764077 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 160250281 + 39513796 = 12659^2 + 6286^2 .

It is an emirp because it is prime and its reverse (770467991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199764077 - 2¹⁴ = 199747693 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 (199764007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99882038 + 99882039.

It is an arithmetic number, because the mean of its divisors is an integer number (99882039).

Almost surely, 2^199764077 is an apocalyptic number.

It is an amenable number.

199764077 is a deficient number, since it is larger than the sum of its proper divisors (1).

199764077 is an equidigital number, since it uses as much as digits as its factorization.

199764077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 666792, while the sum is 50.

The square root of 199764077 is about 14133.7920247894. The cubic root of 199764077 is about 584.5735094877.

The spelling of 199764077 in words is "one hundred ninety-nine million, seven hundred sixty-four thousand, seventy-seven".