919797127 has 2 divisors, whose sum is σ = 919797128. Its totient is φ = 919797126.

The previous prime is 919797029. The next prime is 919797161. The reversal of 919797127 is 721797919.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-919797127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (919797167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 459898563 + 459898564.

It is an arithmetic number, because the mean of its divisors is an integer number (459898564).

Almost surely, 2^919797127 is an apocalyptic number.

919797127 is a deficient number, since it is larger than the sum of its proper divisors (1).

919797127 is an equidigital number, since it uses as much as digits as its factorization.

919797127 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 500094, while the sum is 52.

The square root of 919797127 is about 30328.1573294521. The cubic root of 919797127 is about 972.5173311036.

The spelling of 919797127 in words is "nine hundred nineteen million, seven hundred ninety-seven thousand, one hundred twenty-seven".