1920934997 has 2 divisors, whose sum is σ = 1920934998. Its totient is φ = 1920934996.

The previous prime is 1920934987. The next prime is 1920935041. The reversal of 1920934997 is 7994390291.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1839466321 + 81468676 = 42889^2 + 9026^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1920934997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1920934987) 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, 960467498 + 960467499.

It is an arithmetic number, because the mean of its divisors is an integer number (960467499).

Almost surely, 2^1920934997 is an apocalyptic number.

It is an amenable number.

1920934997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1920934997 is an equidigital number, since it uses as much as digits as its factorization.

1920934997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1102248, while the sum is 53.

The square root of 1920934997 is about 43828.4724465729. The cubic root of 1920934997 is about 1243.0947233261.

The spelling of 1920934997 in words is "one billion, nine hundred twenty million, nine hundred thirty-four thousand, nine hundred ninety-seven".