64684969 has 4 divisors (see below), whose sum is σ = 64702080. Its totient is φ = 64667860.

The previous prime is 64684957. The next prime is 64684973. The reversal of 64684969 is 96948646.

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 not a de Polignac number, because 64684969 - 2¹¹ = 64682921 is a prime.

It is a super-2 number, since 2×64684969² = 8368290429061922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64684999) 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, 97 + ... + 11374.

It is an arithmetic number, because the mean of its divisors is an integer number (16175520).

Almost surely, 2^64684969 is an apocalyptic number.

It is an amenable number.

64684969 is a deficient number, since it is larger than the sum of its proper divisors (17111).

64684969 is a wasteful number, since it uses less digits than its factorization.

64684969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17110.

The product of its digits is 2239488, while the sum is 52.

The square root of 64684969 is about 8042.6966248889. The cubic root of 64684969 is about 401.4219578498.

The spelling of 64684969 in words is "sixty-four million, six hundred eighty-four thousand, nine hundred sixty-nine".