1630873 has 4 divisors (see below), whose sum is σ = 1687140. Its totient is φ = 1574608.

The previous prime is 1630859. The next prime is 1630891. The reversal of 1630873 is 3780361.

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 870489 + 760384 = 933^2 + 872^2 .

It is a cyclic number.

It is not a de Polignac number, because 1630873 - 2⁵ = 1630841 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (1630813) 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, 28090 + ... + 28147.

It is an arithmetic number, because the mean of its divisors is an integer number (421785).

2^1630873 is an apocalyptic number.

It is an amenable number.

1630873 is a deficient number, since it is larger than the sum of its proper divisors (56267).

1630873 is an equidigital number, since it uses as much as digits as its factorization.

1630873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56266.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 1630873 is about 1277.0563809010. The cubic root of 1630873 is about 117.7081988530.

The spelling of 1630873 in words is "one million, six hundred thirty thousand, eight hundred seventy-three".