1630634431 has 2 divisors, whose sum is σ = 1630634432. Its totient is φ = 1630634430.

The previous prime is 1630634413. The next prime is 1630634449. The reversal of 1630634431 is 1344360361.

It is a happy number.

Together with previous prime (1630634413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (1630634413) and next prime (1630634449).

It is an emirp because it is prime and its reverse (1344360361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1630634431 - 2⁵ = 1630634399 is a prime.

It is a super-3 number, since 3×1630634431³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 1630634393 and 1630634402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1630434431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 815317215 + 815317216.

It is an arithmetic number, because the mean of its divisors is an integer number (815317216).

Almost surely, 2^1630634431 is an apocalyptic number.

1630634431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1630634431 is an equidigital number, since it uses as much as digits as its factorization.

1630634431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 1630634431 is about 40381.1147815411. The cubic root of 1630634431 is about 1177.0245900348.

Adding to 1630634431 its reverse (1344360361), we get a palindrome (2974994792).

The spelling of 1630634431 in words is "one billion, six hundred thirty million, six hundred thirty-four thousand, four hundred thirty-one".