1634340401 has 4 divisors (see below), whose sum is σ = 1674202404. Its totient is φ = 1594478400.

The previous prime is 1634340361. The next prime is 1634340503. The reversal of 1634340401 is 1040434361.

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 66259600 + 1568080801 = 8140^2 + 39599^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1634340401 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1634340901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19930940 + ... + 19931021.

It is an arithmetic number, because the mean of its divisors is an integer number (418550601).

Almost surely, 2^1634340401 is an apocalyptic number.

It is an amenable number.

1634340401 is a deficient number, since it is larger than the sum of its proper divisors (39862003).

1634340401 is an equidigital number, since it uses as much as digits as its factorization.

1634340401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39862002.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 1634340401 is about 40426.9761545431. The cubic root of 1634340401 is about 1177.9155964962.

Adding to 1634340401 its reverse (1040434361), we get a palindrome (2674774762).

The spelling of 1634340401 in words is "one billion, six hundred thirty-four million, three hundred forty thousand, four hundred one".