1920613 has 2 divisors, whose sum is σ = 1920614. Its totient is φ = 1920612.

The previous prime is 1920601. The next prime is 1920617. The reversal of 1920613 is 3160291.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1803649 + 116964 = 1343^2 + 342^2 .

It is an emirp because it is prime and its reverse (3160291) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1920613 - 2⁹ = 1920101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1920617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 960306 + 960307.

It is an arithmetic number, because the mean of its divisors is an integer number (960307).

2^1920613 is an apocalyptic number.

It is an amenable number.

1920613 is a deficient number, since it is larger than the sum of its proper divisors (1).

1920613 is an equidigital number, since it uses as much as digits as its factorization.

1920613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 1920613 is about 1385.8618257243. The cubic root of 1920613 is about 124.3025261469.

The spelling of 1920613 in words is "one million, nine hundred twenty thousand, six hundred thirteen".