1920073 has 4 divisors (see below), whose sum is σ = 1927188. Its totient is φ = 1912960.

The previous prime is 1920049. The next prime is 1920089. The reversal of 1920073 is 3700291.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 727609 + 1192464 = 853^2 + 1092^2 .

It is a cyclic number.

It is not a de Polignac number, because 1920073 - 2¹³ = 1911881 is a prime.

It is a Duffinian number.

1920073 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1920013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3136 + ... + 3697.

It is an arithmetic number, because the mean of its divisors is an integer number (481797).

2^1920073 is an apocalyptic number.

It is an amenable number.

1920073 is a deficient number, since it is larger than the sum of its proper divisors (7115).

1920073 is an equidigital number, since it uses as much as digits as its factorization.

1920073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7114.

The product of its (nonzero) digits is 378, while the sum is 22.

The square root of 1920073 is about 1385.6669874108. Note that the first 3 decimals coincide. The cubic root of 1920073 is about 124.2908754124.

The spelling of 1920073 in words is "one million, nine hundred twenty thousand, seventy-three".