64903231 has 2 divisors, whose sum is σ = 64903232. Its totient is φ = 64903230.

The previous prime is 64903187. The next prime is 64903249. The reversal of 64903231 is 13230946.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64903231 - 2¹¹ = 64901183 is a prime.

It is a super-2 number, since 2×64903231² = 8424858788478722, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64903231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64903931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32451615 + 32451616.

It is an arithmetic number, because the mean of its divisors is an integer number (32451616).

Almost surely, 2^64903231 is an apocalyptic number.

64903231 is a deficient number, since it is larger than the sum of its proper divisors (1).

64903231 is an equidigital number, since it uses as much as digits as its factorization.

64903231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 64903231 is about 8056.2541543822. The cubic root of 64903231 is about 401.8729477291.

The spelling of 64903231 in words is "sixty-four million, nine hundred three thousand, two hundred thirty-one".