421678458697 has 2 divisors, whose sum is σ = 421678458698. Its totient is φ = 421678458696.

The previous prime is 421678458679. The next prime is 421678458709. The reversal of 421678458697 is 796854876124.

Together with previous prime (421678458679) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 226686445456 + 194992013241 = 476116^2 + 441579^2 .

It is a cyclic number.

It is not a de Polignac number, because 421678458697 - 2⁷ = 421678458569 is a prime.

It is not a weakly prime, because it can be changed into another prime (421678453697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210839229348 + 210839229349.

It is an arithmetic number, because the mean of its divisors is an integer number (210839229349).

Almost surely, 2^421678458697 is an apocalyptic number.

It is an amenable number.

421678458697 is a deficient number, since it is larger than the sum of its proper divisors (1).

421678458697 is an equidigital number, since it uses as much as digits as its factorization.

421678458697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 162570240, while the sum is 67.

The spelling of 421678458697 in words is "four hundred twenty-one billion, six hundred seventy-eight million, four hundred fifty-eight thousand, six hundred ninety-seven".