64922009 has 4 divisors (see below), whose sum is σ = 65118480. Its totient is φ = 64725540.

The previous prime is 64921999. The next prime is 64922021. The reversal of 64922009 is 90022946.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64922009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64922059) 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, 97739 + ... + 98400.

It is an arithmetic number, because the mean of its divisors is an integer number (16279620).

Almost surely, 2^64922009 is an apocalyptic number.

It is an amenable number.

64922009 is a deficient number, since it is larger than the sum of its proper divisors (196471).

64922009 is a wasteful number, since it uses less digits than its factorization.

64922009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196470.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 64922009 is about 8057.4195000633. The cubic root of 64922009 is about 401.9117010261.

The spelling of 64922009 in words is "sixty-four million, nine hundred twenty-two thousand, nine".