1920617 has 2 divisors, whose sum is σ = 1920618. Its totient is φ = 1920616.

The previous prime is 1920613. The next prime is 1920631. The reversal of 1920617 is 7160291.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1907161 + 13456 = 1381^2 + 116^2 .

It is a cyclic number.

It is not a de Polignac number, because 1920617 - 2² = 1920613 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1920613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 960308 + 960309.

It is an arithmetic number, because the mean of its divisors is an integer number (960309).

2^1920617 is an apocalyptic number.

It is an amenable number.

1920617 is a deficient number, since it is larger than the sum of its proper divisors (1).

1920617 is an equidigital number, since it uses as much as digits as its factorization.

1920617 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 1920617 is about 1385.8632688689. The cubic root of 1920617 is about 124.3026124404.

The spelling of 1920617 in words is "one million, nine hundred twenty thousand, six hundred seventeen".