1630104521 has 2 divisors, whose sum is σ = 1630104522. Its totient is φ = 1630104520.

The previous prime is 1630104499. The next prime is 1630104533. The reversal of 1630104521 is 1254010361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1262807296 + 367297225 = 35536^2 + 19165^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1630104521 is a prime.

It is not a weakly prime, because it can be changed into another prime (1630104571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 815052260 + 815052261.

It is an arithmetic number, because the mean of its divisors is an integer number (815052261).

Almost surely, 2^1630104521 is an apocalyptic number.

It is an amenable number.

1630104521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1630104521 is an equidigital number, since it uses as much as digits as its factorization.

1630104521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 1630104521 is about 40374.5528891652. The cubic root of 1630104521 is about 1176.8970763374.

Adding to 1630104521 its reverse (1254010361), we get a palindrome (2884114882).

The spelling of 1630104521 in words is "one billion, six hundred thirty million, one hundred four thousand, five hundred twenty-one".