64620433 has 2 divisors, whose sum is σ = 64620434. Its totient is φ = 64620432.

The previous prime is 64620427. The next prime is 64620511. The reversal of 64620433 is 33402646.

64620433 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37246609 + 27373824 = 6103^2 + 5232^2 .

It is a cyclic number.

It is not a de Polignac number, because 64620433 - 2⁵ = 64620401 is a prime.

It is a super-2 number, since 2×64620433² = 8351600722214978, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (64620233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32310216 + 32310217.

It is an arithmetic number, because the mean of its divisors is an integer number (32310217).

Almost surely, 2^64620433 is an apocalyptic number.

It is an amenable number.

64620433 is a deficient number, since it is larger than the sum of its proper divisors (1).

64620433 is an equidigital number, since it uses as much as digits as its factorization.

64620433 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 28.

The square root of 64620433 is about 8038.6835365002. The cubic root of 64620433 is about 401.2884142659.

The spelling of 64620433 in words is "sixty-four million, six hundred twenty thousand, four hundred thirty-three".