1634609 has 2 divisors, whose sum is σ = 1634610. Its totient is φ = 1634608.

The previous prime is 1634603. The next prime is 1634657. The reversal of 1634609 is 9064361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 874225 + 760384 = 935^2 + 872^2 .

It is a cyclic number.

It is not a de Polignac number, because 1634609 - 2⁴ = 1634593 is a prime.

It is a plaindrome in base 15.

It is not a weakly prime, because it can be changed into another prime (1634603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 817304 + 817305.

It is an arithmetic number, because the mean of its divisors is an integer number (817305).

2^1634609 is an apocalyptic number.

It is an amenable number.

1634609 is a deficient number, since it is larger than the sum of its proper divisors (1).

1634609 is an equidigital number, since it uses as much as digits as its factorization.

1634609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 1634609 is about 1278.5182830136. The cubic root of 1634609 is about 117.7980121940.

The spelling of 1634609 in words is "one million, six hundred thirty-four thousand, six hundred nine".