64394067 has 18 divisors (see below), whose sum is σ = 88789636. Its totient is φ = 41511680.

The previous prime is 64394063. The next prime is 64394069. The reversal of 64394067 is 76049346.

It is not a de Polignac number, because 64394067 - 2² = 64394063 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64394063) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 569803 + ... + 569915.

Almost surely, 2^64394067 is an apocalyptic number.

64394067 is a deficient number, since it is larger than the sum of its proper divisors (24395569).

64394067 is an equidigital number, since it uses as much as digits as its factorization.

64394067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311 (or 157 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 39.

The square root of 64394067 is about 8024.5913914666. The cubic root of 64394067 is about 400.8192936657.

The spelling of 64394067 in words is "sixty-four million, three hundred ninety-four thousand, sixty-seven".