421767435017 has 2 divisors, whose sum is σ = 421767435018. Its totient is φ = 421767435016.

The previous prime is 421767435013. The next prime is 421767435107. The reversal of 421767435017 is 710534767124.

Together with next prime (421767435107) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 406936823056 + 14830611961 = 637916^2 + 121781^2 .

It is a cyclic number.

It is not a de Polignac number, because 421767435017 - 2² = 421767435013 is a prime.

It is not a weakly prime, because it can be changed into another prime (421767435013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210883717508 + 210883717509.

It is an arithmetic number, because the mean of its divisors is an integer number (210883717509).

Almost surely, 2^421767435017 is an apocalyptic number.

It is an amenable number.

421767435017 is a deficient number, since it is larger than the sum of its proper divisors (1).

421767435017 is an equidigital number, since it uses as much as digits as its factorization.

421767435017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 987840, while the sum is 47.

The spelling of 421767435017 in words is "four hundred twenty-one billion, seven hundred sixty-seven million, four hundred thirty-five thousand, seventeen".