64953263 has 4 divisors (see below), whose sum is σ = 66463848. Its totient is φ = 63442680.

The previous prime is 64953253. The next prime is 64953271. The reversal of 64953263 is 36235946.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36235946 = 2 ⋅18117973.

It is a cyclic number.

It is not a de Polignac number, because 64953263 - 2¹⁶ = 64887727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64953253) 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 in 3 ways as a sum of consecutive naturals, for example, 755228 + ... + 755313.

It is an arithmetic number, because the mean of its divisors is an integer number (16615962).

Almost surely, 2^64953263 is an apocalyptic number.

64953263 is a deficient number, since it is larger than the sum of its proper divisors (1510585).

64953263 is a wasteful number, since it uses less digits than its factorization.

64953263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1510584.

The product of its digits is 116640, while the sum is 38.

The square root of 64953263 is about 8059.3587213872. The cubic root of 64953263 is about 401.9761852348.

The spelling of 64953263 in words is "sixty-four million, nine hundred fifty-three thousand, two hundred sixty-three".