1634890073 has 2 divisors, whose sum is σ = 1634890074. Its totient is φ = 1634890072.

The previous prime is 1634890043. The next prime is 1634890079. The reversal of 1634890073 is 3700984361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1443012169 + 191877904 = 37987^2 + 13852^2 .

It is a cyclic number.

It is not a de Polignac number, because 1634890073 - 2⁶ = 1634890009 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1634890073.

It is not a weakly prime, because it can be changed into another prime (1634890079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 817445036 + 817445037.

It is an arithmetic number, because the mean of its divisors is an integer number (817445037).

Almost surely, 2^1634890073 is an apocalyptic number.

It is an amenable number.

1634890073 is a deficient number, since it is larger than the sum of its proper divisors (1).

1634890073 is an equidigital number, since it uses as much as digits as its factorization.

1634890073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 1634890073 is about 40433.7739148846. The cubic root of 1634890073 is about 1178.0476364409.

The spelling of 1634890073 in words is "one billion, six hundred thirty-four million, eight hundred ninety thousand, seventy-three".