190191797 has 2 divisors, whose sum is σ = 190191798. Its totient is φ = 190191796.

The previous prime is 190191779. The next prime is 190191817. The reversal of 190191797 is 797191091.

190191797 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (190191779) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 153115876 + 37075921 = 12374^2 + 6089^2 .

It is a cyclic number.

It is not a de Polignac number, because 190191797 - 2¹⁰ = 190190773 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 (190191707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95095898 + 95095899.

It is an arithmetic number, because the mean of its divisors is an integer number (95095899).

Almost surely, 2^190191797 is an apocalyptic number.

It is an amenable number.

190191797 is a deficient number, since it is larger than the sum of its proper divisors (1).

190191797 is an equidigital number, since it uses as much as digits as its factorization.

190191797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35721, while the sum is 44.

The square root of 190191797 is about 13791.0042056407. The cubic root of 190191797 is about 575.0830851584.

It can be divided in two parts, 19019 and 1797, that multiplied together give a palindrome (34177143).

The spelling of 190191797 in words is "one hundred ninety million, one hundred ninety-one thousand, seven hundred ninety-seven".