64864047 has 16 divisors (see below), whose sum is σ = 87706080. Its totient is φ = 42636672.

The previous prime is 64864003. The next prime is 64864049. The reversal of 64864047 is 74046846.

It is not a de Polignac number, because 64864047 - 2¹⁰ = 64863023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64863996 and 64864014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64864049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95473 + ... + 96149.

It is an arithmetic number, because the mean of its divisors is an integer number (5481630).

Almost surely, 2^64864047 is an apocalyptic number.

64864047 is a deficient number, since it is larger than the sum of its proper divisors (22842033).

64864047 is a wasteful number, since it uses less digits than its factorization.

64864047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1082.

The product of its (nonzero) digits is 129024, while the sum is 39.

The square root of 64864047 is about 8053.8218877748. The cubic root of 64864047 is about 401.7920572538.

The spelling of 64864047 in words is "sixty-four million, eight hundred sixty-four thousand, forty-seven".