64505207 has 4 divisors (see below), whose sum is σ = 69467160. Its totient is φ = 59543256.

The previous prime is 64505183. The next prime is 64505227. The reversal of 64505207 is 70250546.

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 64505207 - 2⁶ = 64505143 is a prime.

It is a super-2 number, since 2×64505207² = 8321843460225698, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64505207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64505227) 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, 2480957 + ... + 2480982.

It is an arithmetic number, because the mean of its divisors is an integer number (17366790).

Almost surely, 2^64505207 is an apocalyptic number.

64505207 is a deficient number, since it is larger than the sum of its proper divisors (4961953).

64505207 is a wasteful number, since it uses less digits than its factorization.

64505207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4961952.

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 64505207 is about 8031.5133692225. The cubic root of 64505207 is about 401.0497571979.

The spelling of 64505207 in words is "sixty-four million, five hundred five thousand, two hundred seven".