64629867 has 4 divisors (see below), whose sum is σ = 86173160. Its totient is φ = 43086576.

The previous prime is 64629863. The next prime is 64629881. The reversal of 64629867 is 76892646.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 64629867 - 2² = 64629863 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64629863) 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, 10771642 + ... + 10771647.

It is an arithmetic number, because the mean of its divisors is an integer number (21543290).

Almost surely, 2^64629867 is an apocalyptic number.

64629867 is a deficient number, since it is larger than the sum of its proper divisors (21543293).

64629867 is a wasteful number, since it uses less digits than its factorization.

64629867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21543292.

The product of its digits is 870912, while the sum is 48.

The square root of 64629867 is about 8039.2703027078. The cubic root of 64629867 is about 401.3079414779.

The spelling of 64629867 in words is "sixty-four million, six hundred twenty-nine thousand, eight hundred sixty-seven".