64923811 has 4 divisors (see below), whose sum is σ = 65498472. Its totient is φ = 64349152.

The previous prime is 64923769. The next prime is 64923821. The reversal of 64923811 is 11832946.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64923811 - 2¹¹ = 64921763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64923821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 287161 + ... + 287386.

It is an arithmetic number, because the mean of its divisors is an integer number (16374618).

Almost surely, 2^64923811 is an apocalyptic number.

64923811 is a deficient number, since it is larger than the sum of its proper divisors (574661).

64923811 is a wasteful number, since it uses less digits than its factorization.

64923811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574660.

The product of its digits is 10368, while the sum is 34.

The square root of 64923811 is about 8057.5313216890. The cubic root of 64923811 is about 401.9154195297.

The spelling of 64923811 in words is "sixty-four million, nine hundred twenty-three thousand, eight hundred eleven".