1630473631 has 2 divisors, whose sum is σ = 1630473632. Its totient is φ = 1630473630.

The previous prime is 1630473617. The next prime is 1630473659. The reversal of 1630473631 is 1363740361.

It is a weak prime.

It is an emirp because it is prime and its reverse (1363740361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1630473631 - 2⁵ = 1630473599 is a prime.

It is a super-2 number, since 2×1630473631² = 5316888522772648322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1630473671) 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, 815236815 + 815236816.

It is an arithmetic number, because the mean of its divisors is an integer number (815236816).

Almost surely, 2^1630473631 is an apocalyptic number.

1630473631 is a deficient number, since it is larger than the sum of its proper divisors (1).

1630473631 is an equidigital number, since it uses as much as digits as its factorization.

1630473631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 34.

The square root of 1630473631 is about 40379.1237027254. The cubic root of 1630473631 is about 1176.9858992095.

The spelling of 1630473631 in words is "one billion, six hundred thirty million, four hundred seventy-three thousand, six hundred thirty-one".