64967287 has 32 divisors (see below), whose sum is σ = 84211200. Its totient is φ = 49674240.

The previous prime is 64967269. The next prime is 64967311. The reversal of 64967287 is 78276946.

It is not a de Polignac number, because 64967287 - 2⁷ = 64967159 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

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 64967287.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64967237) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 252663 + ... + 252919.

It is an arithmetic number, because the mean of its divisors is an integer number (2631600).

Almost surely, 2^64967287 is an apocalyptic number.

64967287 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

64967287 is a deficient number, since it is larger than the sum of its proper divisors (19243913).

64967287 is a wasteful number, since it uses less digits than its factorization.

64967287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356 (or 342 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 49.

The square root of 64967287 is about 8060.2287188392. The cubic root of 64967287 is about 402.0051132572.

The spelling of 64967287 in words is "sixty-four million, nine hundred sixty-seven thousand, two hundred eighty-seven".