1628313 has 4 divisors (see below), whose sum is σ = 2171088. Its totient is φ = 1085540.

The previous prime is 1628309. The next prime is 1628317. The reversal of 1628313 is 3138261.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (1628309) and next prime (1628317).

It is a cyclic number.

It is not a de Polignac number, because 1628313 - 2² = 1628309 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (1628317) 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, 271383 + ... + 271388.

It is an arithmetic number, because the mean of its divisors is an integer number (542772).

2^1628313 is an apocalyptic number.

It is an amenable number.

1628313 is a deficient number, since it is larger than the sum of its proper divisors (542775).

1628313 is an equidigital number, since it uses as much as digits as its factorization.

1628313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542774.

The product of its digits is 864, while the sum is 24.

The square root of 1628313 is about 1276.0536822564. The cubic root of 1628313 is about 117.6465772970.

The spelling of 1628313 in words is "one million, six hundred twenty-eight thousand, three hundred thirteen".