428693788513 has 2 divisors, whose sum is σ = 428693788514. Its totient is φ = 428693788512.

The previous prime is 428693788489. The next prime is 428693788519. The reversal of 428693788513 is 315887396824.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 421750232929 + 6943555584 = 649423^2 + 83328^2 .

It is a cyclic number.

It is not a de Polignac number, because 428693788513 - 2³³ = 420103853921 is a prime.

It is not a weakly prime, because it can be changed into another prime (428693788519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214346894256 + 214346894257.

It is an arithmetic number, because the mean of its divisors is an integer number (214346894257).

Almost surely, 2^428693788513 is an apocalyptic number.

It is an amenable number.

428693788513 is a deficient number, since it is larger than the sum of its proper divisors (1).

428693788513 is an equidigital number, since it uses as much as digits as its factorization.

428693788513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69672960, while the sum is 64.

The spelling of 428693788513 in words is "four hundred twenty-eight billion, six hundred ninety-three million, seven hundred eighty-eight thousand, five hundred thirteen".