1930645 has 4 divisors (see below), whose sum is σ = 2316780. Its totient is φ = 1544512.

The previous prime is 1930633. The next prime is 1930667. The reversal of 1930645 is 5460391.

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 877969 + 1052676 = 937^2 + 1026^2 .

It is a cyclic number.

It is not a de Polignac number, because 1930645 - 2⁷ = 1930517 is a prime.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 193060 + ... + 193069.

It is an arithmetic number, because the mean of its divisors is an integer number (579195).

2^1930645 is an apocalyptic number.

It is an amenable number.

1930645 is a deficient number, since it is larger than the sum of its proper divisors (386135).

1930645 is an equidigital number, since it uses as much as digits as its factorization.

1930645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386134.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 1930645 is about 1389.4765201327. The cubic root of 1930645 is about 124.5185748859.

The spelling of 1930645 in words is "one million, nine hundred thirty thousand, six hundred forty-five".