64206005 has 4 divisors (see below), whose sum is σ = 77047212. Its totient is φ = 51364800.

The previous prime is 64206001. The next prime is 64206007. The reversal of 64206005 is 50060246.

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

It can be written as a sum of positive squares in 2 ways, for example, as 31292836 + 32913169 = 5594^2 + 5737^2 .

It is not a de Polignac number, because 64206005 - 2² = 64206001 is a prime.

It is a super-2 number, since 2×64206005² = 8244822156120050, 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 (64206001) 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, 6420596 + ... + 6420605.

It is an arithmetic number, because the mean of its divisors is an integer number (19261803).

Almost surely, 2^64206005 is an apocalyptic number.

It is an amenable number.

64206005 is a deficient number, since it is larger than the sum of its proper divisors (12841207).

64206005 is a wasteful number, since it uses less digits than its factorization.

64206005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12841206.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 64206005 is about 8012.8649682869. The cubic root of 64206005 is about 400.4287174226.

The spelling of 64206005 in words is "sixty-four million, two hundred six thousand, five".