1920497 has 2 divisors, whose sum is σ = 1920498. Its totient is φ = 1920496.

The previous prime is 1920487. The next prime is 1920521. The reversal of 1920497 is 7940291.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1915456 + 5041 = 1384^2 + 71^2 .

It is a cyclic number.

It is not a de Polignac number, because 1920497 - 2⁶ = 1920433 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1920407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 960248 + 960249.

It is an arithmetic number, because the mean of its divisors is an integer number (960249).

2^1920497 is an apocalyptic number.

It is an amenable number.

1920497 is a deficient number, since it is larger than the sum of its proper divisors (1).

1920497 is an equidigital number, since it uses as much as digits as its factorization.

1920497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 1920497 is about 1385.8199738783. The cubic root of 1920497 is about 124.3000235807.

The spelling of 1920497 in words is "one million, nine hundred twenty thousand, four hundred ninety-seven".