1005423631 has 2 divisors, whose sum is σ = 1005423632. Its totient is φ = 1005423630.

The previous prime is 1005423619. The next prime is 1005423637. The reversal of 1005423631 is 1363245001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1005423631 - 2¹¹ = 1005421583 is a prime.

It is a super-2 number, since 2×1005423631² = 2021753355546448322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1005423596 and 1005423605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1005423637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 502711815 + 502711816.

It is an arithmetic number, because the mean of its divisors is an integer number (502711816).

Almost surely, 2^1005423631 is an apocalyptic number.

1005423631 is a deficient number, since it is larger than the sum of its proper divisors (1).

1005423631 is an equidigital number, since it uses as much as digits as its factorization.

1005423631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 1005423631 is about 31708.4157756265. The cubic root of 1005423631 is about 1001.8046183935.

Adding to 1005423631 its reverse (1363245001), we get a palindrome (2368668632).

The spelling of 1005423631 in words is "one billion, five million, four hundred twenty-three thousand, six hundred thirty-one".