1920620017 has 2 divisors, whose sum is σ = 1920620018. Its totient is φ = 1920620016.

The previous prime is 1920619957. The next prime is 1920620029. The reversal of 1920620017 is 7100260291.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1603922401 + 316697616 = 40049^2 + 17796^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1920620017 is a prime.

It is not a weakly prime, because it can be changed into another prime (1920620047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 960310008 + 960310009.

It is an arithmetic number, because the mean of its divisors is an integer number (960310009).

Almost surely, 2^1920620017 is an apocalyptic number.

It is an amenable number.

1920620017 is a deficient number, since it is larger than the sum of its proper divisors (1).

1920620017 is an equidigital number, since it uses as much as digits as its factorization.

1920620017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 1920620017 is about 43824.8789730217. The cubic root of 1920620017 is about 1243.0267752731.

The spelling of 1920620017 in words is "one billion, nine hundred twenty million, six hundred twenty thousand, seventeen".