64705973 has 4 divisors (see below), whose sum is σ = 64727520. Its totient is φ = 64684428.

The previous prime is 64705957. The next prime is 64705999. The reversal of 64705973 is 37950746.

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 not a de Polignac number, because 64705973 - 2⁴ = 64705957 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 64705973.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64705943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5363 + ... + 12576.

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

Almost surely, 2^64705973 is an apocalyptic number.

It is an amenable number.

64705973 is a deficient number, since it is larger than the sum of its proper divisors (21547).

64705973 is a wasteful number, since it uses less digits than its factorization.

64705973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21546.

The product of its (nonzero) digits is 158760, while the sum is 41.

The square root of 64705973 is about 8044.0022998505. The cubic root of 64705973 is about 401.4654020198.

The spelling of 64705973 in words is "sixty-four million, seven hundred five thousand, nine hundred seventy-three".