1920437 has 2 divisors, whose sum is σ = 1920438. Its totient is φ = 1920436.

The previous prime is 1920433. The next prime is 1920469. The reversal of 1920437 is 7340291.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1062961 + 857476 = 1031^2 + 926^2 .

It is a cyclic number.

It is not a de Polignac number, because 1920437 - 2² = 1920433 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1920433) 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, 960218 + 960219.

It is an arithmetic number, because the mean of its divisors is an integer number (960219).

2^1920437 is an apocalyptic number.

It is an amenable number.

1920437 is a deficient number, since it is larger than the sum of its proper divisors (1).

1920437 is an equidigital number, since it uses as much as digits as its factorization.

1920437 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 1920437 is about 1385.7983258757. The cubic root of 1920437 is about 124.2987291104.

The spelling of 1920437 in words is "one million, nine hundred twenty thousand, four hundred thirty-seven".