1630399843 has 2 divisors, whose sum is σ = 1630399844. Its totient is φ = 1630399842.

The previous prime is 1630399831. The next prime is 1630399853. The reversal of 1630399843 is 3489930361.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1630399843 - 2²¹ = 1628302691 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1630399793 and 1630399802.

It is not a weakly prime, because it can be changed into another prime (1630399853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 815199921 + 815199922.

It is an arithmetic number, because the mean of its divisors is an integer number (815199922).

Almost surely, 2^1630399843 is an apocalyptic number.

1630399843 is a deficient number, since it is larger than the sum of its proper divisors (1).

1630399843 is an equidigital number, since it uses as much as digits as its factorization.

1630399843 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 419904, while the sum is 46.

The square root of 1630399843 is about 40378.2100024258. The cubic root of 1630399843 is about 1176.9681438890.

The spelling of 1630399843 in words is "one billion, six hundred thirty million, three hundred ninety-nine thousand, eight hundred forty-three".