64699933 has 2 divisors, whose sum is σ = 64699934. Its totient is φ = 64699932.

The previous prime is 64699891. The next prime is 64699937. The reversal of 64699933 is 33999646.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55621764 + 9078169 = 7458^2 + 3013^2 .

It is a cyclic number.

It is not a de Polignac number, because 64699933 - 2¹³ = 64691741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64699937) 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, 32349966 + 32349967.

It is an arithmetic number, because the mean of its divisors is an integer number (32349967).

Almost surely, 2^64699933 is an apocalyptic number.

It is an amenable number.

64699933 is a deficient number, since it is larger than the sum of its proper divisors (1).

64699933 is an equidigital number, since it uses as much as digits as its factorization.

64699933 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 944784, while the sum is 49.

The square root of 64699933 is about 8043.6268560892. The cubic root of 64699933 is about 401.4529099918.

The spelling of 64699933 in words is "sixty-four million, six hundred ninety-nine thousand, nine hundred thirty-three".