64684469 has 4 divisors (see below), whose sum is σ = 64727520. Its totient is φ = 64641420.

The previous prime is 64684463. The next prime is 64684481. The reversal of 64684469 is 96448646.

It is a happy number.

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-64684469 is a prime.

It is a super-2 number, since 2×64684469² = 8368161059623922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64684463) 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, 19187 + ... + 22304.

It is an arithmetic number, because the mean of its divisors is an integer number (16181880).

Almost surely, 2^64684469 is an apocalyptic number.

It is an amenable number.

64684469 is a deficient number, since it is larger than the sum of its proper divisors (43051).

64684469 is a wasteful number, since it uses less digits than its factorization.

64684469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43050.

The product of its digits is 995328, while the sum is 47.

The square root of 64684469 is about 8042.6655407272. The cubic root of 64684469 is about 401.4209235472.

The spelling of 64684469 in words is "sixty-four million, six hundred eighty-four thousand, four hundred sixty-nine".