64124047 has 4 divisors (see below), whose sum is σ = 69056680. Its totient is φ = 59191416.

The previous prime is 64124033. The next prime is 64124059. The reversal of 64124047 is 74042146.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64124047 is a prime.

It is a super-2 number, since 2×64124047² = 8223786807316418, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64124077) 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, 2466297 + ... + 2466322.

It is an arithmetic number, because the mean of its divisors is an integer number (17264170).

Almost surely, 2^64124047 is an apocalyptic number.

64124047 is a deficient number, since it is larger than the sum of its proper divisors (4932633).

64124047 is a wasteful number, since it uses less digits than its factorization.

64124047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4932632.

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 64124047 is about 8007.7491843838. The cubic root of 64124047 is about 400.2582644628.

The spelling of 64124047 in words is "sixty-four million, one hundred twenty-four thousand, forty-seven".