190899077 has 2 divisors, whose sum is σ = 190899078. Its totient is φ = 190899076.

The previous prime is 190899019. The next prime is 190899097. The reversal of 190899077 is 770998091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 185885956 + 5013121 = 13634^2 + 2239^2 .

It is a cyclic number.

It is not a de Polignac number, because 190899077 - 2⁸ = 190898821 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 (190899017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95449538 + 95449539.

It is an arithmetic number, because the mean of its divisors is an integer number (95449539).

Almost surely, 2^190899077 is an apocalyptic number.

It is an amenable number.

190899077 is a deficient number, since it is larger than the sum of its proper divisors (1).

190899077 is an equidigital number, since it uses as much as digits as its factorization.

190899077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 285768, while the sum is 50.

The square root of 190899077 is about 13816.6232126377. The cubic root of 190899077 is about 575.7950710115.

The spelling of 190899077 in words is "one hundred ninety million, eight hundred ninety-nine thousand, seventy-seven".