421184236387 has 2 divisors, whose sum is σ = 421184236388. Its totient is φ = 421184236386.

The previous prime is 421184236379. The next prime is 421184236471. The reversal of 421184236387 is 783632481124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 421184236387 - 2³ = 421184236379 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 421184236387.

It is not a weakly prime, because it can be changed into another prime (421184236307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210592118193 + 210592118194.

It is an arithmetic number, because the mean of its divisors is an integer number (210592118194).

Almost surely, 2^421184236387 is an apocalyptic number.

421184236387 is a deficient number, since it is larger than the sum of its proper divisors (1).

421184236387 is an equidigital number, since it uses as much as digits as its factorization.

421184236387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1548288, while the sum is 49.

The spelling of 421184236387 in words is "four hundred twenty-one billion, one hundred eighty-four million, two hundred thirty-six thousand, three hundred eighty-seven".