64984679 has 4 divisors (see below), whose sum is σ = 67225560. Its totient is φ = 62743800.

The previous prime is 64984663. The next prime is 64984681. The reversal of 64984679 is 97648946.

It is a happy number.

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 64984679 - 2⁴ = 64984663 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 64984679.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64984609) 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, 1120397 + ... + 1120454.

It is an arithmetic number, because the mean of its divisors is an integer number (16806390).

Almost surely, 2^64984679 is an apocalyptic number.

64984679 is a deficient number, since it is larger than the sum of its proper divisors (2240881).

64984679 is a wasteful number, since it uses less digits than its factorization.

64984679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2240880.

The product of its digits is 2612736, while the sum is 53.

The square root of 64984679 is about 8061.3075242171. The cubic root of 64984679 is about 402.0409828435.

The spelling of 64984679 in words is "sixty-four million, nine hundred eighty-four thousand, six hundred seventy-nine".