64663031 has 2 divisors, whose sum is σ = 64663032. Its totient is φ = 64663030.

The previous prime is 64663009. The next prime is 64663033. The reversal of 64663031 is 13036646.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64663031 - 2⁶ = 64662967 is a prime.

It is a super-2 number, since 2×64663031² = 8362615156213922, which contains 22 as substring.

Together with 64663033, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 64662985 and 64663003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64663033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32331515 + 32331516.

It is an arithmetic number, because the mean of its divisors is an integer number (32331516).

Almost surely, 2^64663031 is an apocalyptic number.

64663031 is a deficient number, since it is larger than the sum of its proper divisors (1).

64663031 is an equidigital number, since it uses as much as digits as its factorization.

64663031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 29.

The square root of 64663031 is about 8041.3326631846. The cubic root of 64663031 is about 401.3765717743.

Adding to 64663031 its reverse (13036646), we get a palindrome (77699677).

The spelling of 64663031 in words is "sixty-four million, six hundred sixty-three thousand, thirty-one".