1634031649 has 2 divisors, whose sum is σ = 1634031650. Its totient is φ = 1634031648.

The previous prime is 1634031647. The next prime is 1634031661. The reversal of 1634031649 is 9461304361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1531313424 + 102718225 = 39132^2 + 10135^2 .

It is a cyclic number.

It is not a de Polignac number, because 1634031649 - 2¹ = 1634031647 is a prime.

Together with 1634031647, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1634031647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 817015824 + 817015825.

It is an arithmetic number, because the mean of its divisors is an integer number (817015825).

Almost surely, 2^1634031649 is an apocalyptic number.

It is an amenable number.

1634031649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1634031649 is an equidigital number, since it uses as much as digits as its factorization.

1634031649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 37.

The square root of 1634031649 is about 40423.1573358638. The cubic root of 1634031649 is about 1177.8414163763.

The spelling of 1634031649 in words is "one billion, six hundred thirty-four million, thirty-one thousand, six hundred forty-nine".