64670873 has 4 divisors (see below), whose sum is σ = 68475060. Its totient is φ = 60866688.

The previous prime is 64670843. The next prime is 64670891. The reversal of 64670873 is 37807646.

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

It can be written as a sum of positive squares in 2 ways, for example, as 46963609 + 17707264 = 6853^2 + 4208^2 .

It is a cyclic number.

It is not a de Polignac number, because 64670873 - 2¹⁴ = 64654489 is a prime.

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 64670873.

It is not an unprimeable number, because it can be changed into a prime (64670843) 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, 1902068 + ... + 1902101.

It is an arithmetic number, because the mean of its divisors is an integer number (17118765).

Almost surely, 2^64670873 is an apocalyptic number.

It is an amenable number.

64670873 is a deficient number, since it is larger than the sum of its proper divisors (3804187).

64670873 is a wasteful number, since it uses less digits than its factorization.

64670873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3804186.

The product of its (nonzero) digits is 169344, while the sum is 41.

The square root of 64670873 is about 8041.8202541464. The cubic root of 64670873 is about 401.3927967475.

The spelling of 64670873 in words is "sixty-four million, six hundred seventy thousand, eight hundred seventy-three".