646293413 has 2 divisors, whose sum is σ = 646293414. Its totient is φ = 646293412.

The previous prime is 646293409. The next prime is 646293419. The reversal of 646293413 is 314392646.

It is a happy number.

646293413 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 643028164 + 3265249 = 25358^2 + 1807^2 .

It is a cyclic number.

It is not a de Polignac number, because 646293413 - 2² = 646293409 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (646293419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323146706 + 323146707.

It is an arithmetic number, because the mean of its divisors is an integer number (323146707).

Almost surely, 2^646293413 is an apocalyptic number.

It is an amenable number.

646293413 is a deficient number, since it is larger than the sum of its proper divisors (1).

646293413 is an equidigital number, since it uses as much as digits as its factorization.

646293413 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 38.

The square root of 646293413 is about 25422.3014890470. The cubic root of 646293413 is about 864.5894062996.

The spelling of 646293413 in words is "six hundred forty-six million, two hundred ninety-three thousand, four hundred thirteen".