646467337 has 4 divisors (see below), whose sum is σ = 652398340. Its totient is φ = 640536336.

The previous prime is 646467277. The next prime is 646467359. The reversal of 646467337 is 733764646.

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 215032896 + 431434441 = 14664^2 + 20771^2 .

It is a cyclic number.

It is not a de Polignac number, because 646467337 - 2²⁷ = 512249609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (646467637) 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, 2965338 + ... + 2965555.

It is an arithmetic number, because the mean of its divisors is an integer number (163099585).

Almost surely, 2^646467337 is an apocalyptic number.

It is an amenable number.

646467337 is a deficient number, since it is larger than the sum of its proper divisors (5931003).

646467337 is a wasteful number, since it uses less digits than its factorization.

646467337 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5931002.

The product of its digits is 1524096, while the sum is 46.

The square root of 646467337 is about 25425.7219563182. The cubic root of 646467337 is about 864.6669558861. Note that the first 3 decimals are identical.

The spelling of 646467337 in words is "six hundred forty-six million, four hundred sixty-seven thousand, three hundred thirty-seven".