64842679 has 4 divisors (see below), whose sum is σ = 70737480. Its totient is φ = 58947880.

The previous prime is 64842619. The next prime is 64842697. The reversal of 64842679 is 97624846.

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 64842679 - 2⁷ = 64842551 is a prime.

It is a super-3 number, since 3×64842679³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64842619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2947384 + ... + 2947405.

It is an arithmetic number, because the mean of its divisors is an integer number (17684370).

Almost surely, 2^64842679 is an apocalyptic number.

64842679 is a deficient number, since it is larger than the sum of its proper divisors (5894801).

64842679 is a wasteful number, since it uses less digits than its factorization.

64842679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5894800.

The product of its digits is 580608, while the sum is 46.

The square root of 64842679 is about 8052.4952033516. The cubic root of 64842679 is about 401.7479319588.

The spelling of 64842679 in words is "sixty-four million, eight hundred forty-two thousand, six hundred seventy-nine".