64469999 has 8 divisors (see below), whose sum is σ = 72046800. Its totient is φ = 57179200.

The previous prime is 64469981. The next prime is 64470031. The reversal of 64469999 is 99996446.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64469999 is a prime.

It is a Duffinian number.

64469999 is a modest number, since divided by 9999 gives 6446 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64469939) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71024 + ... + 71925.

It is an arithmetic number, because the mean of its divisors is an integer number (9005850).

Almost surely, 2^64469999 is an apocalyptic number.

64469999 is a deficient number, since it is larger than the sum of its proper divisors (7576801).

64469999 is a wasteful number, since it uses less digits than its factorization.

64469999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143001.

The product of its digits is 3779136, while the sum is 56.

The square root of 64469999 is about 8029.3212041866. The cubic root of 64469999 is about 400.9767774065.

The spelling of 64469999 in words is "sixty-four million, four hundred sixty-nine thousand, nine hundred ninety-nine".