64630031 has 2 divisors, whose sum is σ = 64630032. Its totient is φ = 64630030.

The previous prime is 64630021. The next prime is 64630037. The reversal of 64630031 is 13003646.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64630031 - 2¹⁰ = 64629007 is a prime.

It is a super-2 number, since 2×64630031² = 8354081814121922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 64629979 and 64630006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64630037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32315015 + 32315016.

It is an arithmetic number, because the mean of its divisors is an integer number (32315016).

Almost surely, 2^64630031 is an apocalyptic number.

64630031 is a deficient number, since it is larger than the sum of its proper divisors (1).

64630031 is an equidigital number, since it uses as much as digits as its factorization.

64630031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 64630031 is about 8039.2805026321. The cubic root of 64630031 is about 401.3082809208.

Adding to 64630031 its reverse (13003646), we get a palindrome (77633677).

The spelling of 64630031 in words is "sixty-four million, six hundred thirty thousand, thirty-one".