64959091 has 4 divisors (see below), whose sum is σ = 68780232. Its totient is φ = 61137952.

The previous prime is 64959077. The next prime is 64959121. The reversal of 64959091 is 19095946.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19095946 = 2 ⋅9547973.

It is a cyclic number.

It is not a de Polignac number, because 64959091 - 2⁷ = 64958963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64959031) 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 in 3 ways as a sum of consecutive naturals, for example, 1910545 + ... + 1910578.

It is an arithmetic number, because the mean of its divisors is an integer number (17195058).

Almost surely, 2^64959091 is an apocalyptic number.

64959091 is a deficient number, since it is larger than the sum of its proper divisors (3821141).

64959091 is a wasteful number, since it uses less digits than its factorization.

64959091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3821140.

The product of its (nonzero) digits is 87480, while the sum is 43.

The square root of 64959091 is about 8059.7202805060. The cubic root of 64959091 is about 401.9882074542.

The spelling of 64959091 in words is "sixty-four million, nine hundred fifty-nine thousand, ninety-one".