646230247 has 16 divisors (see below), whose sum is σ = 720455680. Its totient is φ = 575618400.

The previous prime is 646230203. The next prime is 646230257. The reversal of 646230247 is 742032646.

It is a cyclic number.

It is not a de Polignac number, because 646230247 - 2¹⁵ = 646197479 is a prime.

It is a super-2 number, since 2×646230247² = 835227064275362018, 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 (646230257) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 150622 + ... + 154852.

It is an arithmetic number, because the mean of its divisors is an integer number (45028480).

Almost surely, 2^646230247 is an apocalyptic number.

646230247 is a deficient number, since it is larger than the sum of its proper divisors (74225433).

646230247 is a wasteful number, since it uses less digits than its factorization.

646230247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4654.

The product of its (nonzero) digits is 48384, while the sum is 34.

The square root of 646230247 is about 25421.0591242773. The cubic root of 646230247 is about 864.5612382711.

The spelling of 646230247 in words is "six hundred forty-six million, two hundred thirty thousand, two hundred forty-seven".