646367413 has 4 divisors (see below), whose sum is σ = 674470368. Its totient is φ = 618264460.

The previous prime is 646367411. The next prime is 646367437. The reversal of 646367413 is 314763646.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 646367413 - 2¹ = 646367411 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 (646367411) 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, 14051443 + ... + 14051488.

It is an arithmetic number, because the mean of its divisors is an integer number (168617592).

Almost surely, 2^646367413 is an apocalyptic number.

It is an amenable number.

646367413 is a deficient number, since it is larger than the sum of its proper divisors (28102955).

646367413 is a wasteful number, since it uses less digits than its factorization.

646367413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28102954.

The product of its digits is 217728, while the sum is 40.

The square root of 646367413 is about 25423.7568624309. The cubic root of 646367413 is about 864.6224032702.

The spelling of 646367413 in words is "six hundred forty-six million, three hundred sixty-seven thousand, four hundred thirteen".