64423847 has 4 divisors (see below), whose sum is σ = 65922120. Its totient is φ = 62925576.

The previous prime is 64423817. The next prime is 64423861. The reversal of 64423847 is 74832446.

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 64423847 - 2¹⁰ = 64422823 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 64423847.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64423817) 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, 749072 + ... + 749157.

It is an arithmetic number, because the mean of its divisors is an integer number (16480530).

Almost surely, 2^64423847 is an apocalyptic number.

64423847 is a deficient number, since it is larger than the sum of its proper divisors (1498273).

64423847 is a wasteful number, since it uses less digits than its factorization.

64423847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1498272.

The product of its digits is 129024, while the sum is 38.

The square root of 64423847 is about 8026.4467231771. The cubic root of 64423847 is about 400.8810724368.

The spelling of 64423847 in words is "sixty-four million, four hundred twenty-three thousand, eight hundred forty-seven".