1630280461 has 2 divisors, whose sum is σ = 1630280462. Its totient is φ = 1630280460.

The previous prime is 1630280447. The next prime is 1630280471. The reversal of 1630280461 is 1640820361.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1628122500 + 2157961 = 40350^2 + 1469^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1630280461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1630280401) 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 as a sum of consecutive naturals, namely, 815140230 + 815140231.

It is an arithmetic number, because the mean of its divisors is an integer number (815140231).

Almost surely, 2^1630280461 is an apocalyptic number.

It is an amenable number.

1630280461 is a deficient number, since it is larger than the sum of its proper divisors (1).

1630280461 is an equidigital number, since it uses as much as digits as its factorization.

1630280461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 1630280461 is about 40376.7316780346. The cubic root of 1630280461 is about 1176.9394163264.

The spelling of 1630280461 in words is "one billion, six hundred thirty million, two hundred eighty thousand, four hundred sixty-one".