64731263 has 2 divisors, whose sum is σ = 64731264. Its totient is φ = 64731262.

The previous prime is 64731253. The next prime is 64731281. The reversal of 64731263 is 36213746.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64731263 - 2¹⁴ = 64714879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64731253) 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, 32365631 + 32365632.

It is an arithmetic number, because the mean of its divisors is an integer number (32365632).

Almost surely, 2^64731263 is an apocalyptic number.

64731263 is a deficient number, since it is larger than the sum of its proper divisors (1).

64731263 is an equidigital number, since it uses as much as digits as its factorization.

64731263 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 32.

The square root of 64731263 is about 8045.5741249460. The cubic root of 64731263 is about 401.5176987763.

The spelling of 64731263 in words is "sixty-four million, seven hundred thirty-one thousand, two hundred sixty-three".