421387731867 has 32 divisors (see below), whose sum is σ = 577113638400. Its totient is φ = 273418467840.

The previous prime is 421387731811. The next prime is 421387731889. The reversal of 421387731867 is 768137783124.

It is not a de Polignac number, because 421387731867 - 2¹⁵ = 421387699099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (421387731367) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5132403 + ... + 5213859.

It is an arithmetic number, because the mean of its divisors is an integer number (18034801200).

Almost surely, 2^421387731867 is an apocalyptic number.

421387731867 is a deficient number, since it is larger than the sum of its proper divisors (155725906533).

421387731867 is a wasteful number, since it uses less digits than its factorization.

421387731867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81843.

The product of its digits is 9483264, while the sum is 57.

The spelling of 421387731867 in words is "four hundred twenty-one billion, three hundred eighty-seven million, seven hundred thirty-one thousand, eight hundred sixty-seven".