421293784487 has 2 divisors, whose sum is σ = 421293784488. Its totient is φ = 421293784486.

The previous prime is 421293784459. The next prime is 421293784531. The reversal of 421293784487 is 784487392124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 421293784487 - 2⁸ = 421293784231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421293784687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210646892243 + 210646892244.

It is an arithmetic number, because the mean of its divisors is an integer number (210646892244).

Almost surely, 2^421293784487 is an apocalyptic number.

421293784487 is a deficient number, since it is larger than the sum of its proper divisors (1).

421293784487 is an equidigital number, since it uses as much as digits as its factorization.

421293784487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21676032, while the sum is 59.

The spelling of 421293784487 in words is "four hundred twenty-one billion, two hundred ninety-three million, seven hundred eighty-four thousand, four hundred eighty-seven".