1630697 has 4 divisors (see below), whose sum is σ = 1637760. Its totient is φ = 1623636.

The previous prime is 1630669. The next prime is 1630721. The reversal of 1630697 is 7960361.

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 1630697 - 2⁶ = 1630633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1630597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3173 + ... + 3650.

It is an arithmetic number, because the mean of its divisors is an integer number (409440).

2^1630697 is an apocalyptic number.

It is an amenable number.

1630697 is a deficient number, since it is larger than the sum of its proper divisors (7063).

1630697 is an equidigital number, since it uses as much as digits as its factorization.

1630697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7062.

The product of its (nonzero) digits is 6804, while the sum is 32.

The square root of 1630697 is about 1276.9874705728. The cubic root of 1630697 is about 117.7039644361.

Adding to 1630697 its sum of digits (32), we get a square (1630729 = 1277²).

The spelling of 1630697 in words is "one million, six hundred thirty thousand, six hundred ninety-seven".