421846872697 has 2 divisors, whose sum is σ = 421846872698. Its totient is φ = 421846872696.

The previous prime is 421846872637. The next prime is 421846872743. The reversal of 421846872697 is 796278648124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 339884336016 + 81962536681 = 582996^2 + 286291^2 .

It is a cyclic number.

It is not a de Polignac number, because 421846872697 - 2⁷ = 421846872569 is a prime.

It is not a weakly prime, because it can be changed into another prime (421846872637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210923436348 + 210923436349.

It is an arithmetic number, because the mean of its divisors is an integer number (210923436349).

Almost surely, 2^421846872697 is an apocalyptic number.

It is an amenable number.

421846872697 is a deficient number, since it is larger than the sum of its proper divisors (1).

421846872697 is an equidigital number, since it uses as much as digits as its factorization.

421846872697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 65028096, while the sum is 64.

The spelling of 421846872697 in words is "four hundred twenty-one billion, eight hundred forty-six million, eight hundred seventy-two thousand, six hundred ninety-seven".