64943413 has 2 divisors, whose sum is σ = 64943414. Its totient is φ = 64943412.

The previous prime is 64943377. The next prime is 64943443. The reversal of 64943413 is 31434946.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54066609 + 10876804 = 7353^2 + 3298^2 .

It is a cyclic number.

It is not a de Polignac number, because 64943413 - 2²¹ = 62846261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64943443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32471706 + 32471707.

It is an arithmetic number, because the mean of its divisors is an integer number (32471707).

Almost surely, 2^64943413 is an apocalyptic number.

It is an amenable number.

64943413 is a deficient number, since it is larger than the sum of its proper divisors (1).

64943413 is an equidigital number, since it uses as much as digits as its factorization.

64943413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 34.

The square root of 64943413 is about 8058.7476074139. The cubic root of 64943413 is about 401.9558646463.

It can be divided in two parts, 64943 and 413, that added together give a palindrome (65356).

The spelling of 64943413 in words is "sixty-four million, nine hundred forty-three thousand, four hundred thirteen".