64394087 has 4 divisors (see below), whose sum is σ = 64410336. Its totient is φ = 64377840.

The previous prime is 64394069. The next prime is 64394107. The reversal of 64394087 is 78049346.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 64394087 - 2¹⁸ = 64131943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64394047) 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, 2162 + ... + 11552.

It is an arithmetic number, because the mean of its divisors is an integer number (16102584).

Almost surely, 2^64394087 is an apocalyptic number.

64394087 is a deficient number, since it is larger than the sum of its proper divisors (16249).

64394087 is an equidigital number, since it uses as much as digits as its factorization.

64394087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16248.

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 64394087 is about 8024.5926376359. The cubic root of 64394087 is about 400.8193351622.

The spelling of 64394087 in words is "sixty-four million, three hundred ninety-four thousand, eighty-seven".