421388499 has 16 divisors (see below), whose sum is σ = 644951808. Its totient is φ = 239729952.

The previous prime is 421388483. The next prime is 421388501. The reversal of 421388499 is 994883124.

It is not a de Polignac number, because 421388499 - 2⁴ = 421388483 is a prime.

It is not an unprimeable number, because it can be changed into a prime (421388999) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39432 + ... + 48965.

It is an arithmetic number, because the mean of its divisors is an integer number (40309488).

Almost surely, 2^421388499 is an apocalyptic number.

421388499 is a deficient number, since it is larger than the sum of its proper divisors (223563309).

421388499 is a wasteful number, since it uses less digits than its factorization.

421388499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88634.

The product of its digits is 497664, while the sum is 48.

The square root of 421388499 is about 20527.7494869749. The cubic root of 421388499 is about 749.7115922199.

The spelling of 421388499 in words is "four hundred twenty-one million, three hundred eighty-eight thousand, four hundred ninety-nine".