1630653 has 4 divisors (see below), whose sum is σ = 2174208. Its totient is φ = 1087100.

The previous prime is 1630633. The next prime is 1630663. The reversal of 1630653 is 3560361.

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 a cyclic number.

It is not a de Polignac number, because 1630653 - 2⁵ = 1630621 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1630633) 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, 271773 + ... + 271778.

It is an arithmetic number, because the mean of its divisors is an integer number (543552).

2^1630653 is an apocalyptic number.

It is an amenable number.

1630653 is a deficient number, since it is larger than the sum of its proper divisors (543555).

1630653 is an equidigital number, since it uses as much as digits as its factorization.

1630653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543554.

The product of its (nonzero) digits is 1620, while the sum is 24.

The square root of 1630653 is about 1276.9702424097. The cubic root of 1630653 is about 117.7029057843.

The spelling of 1630653 in words is "one million, six hundred thirty thousand, six hundred fifty-three".