4999998421 has 12 divisors (see below), whose sum is σ = 5629917132. Its totient is φ = 4434584000.

The previous prime is 4999998403. The next prime is 4999998433. The reversal of 4999998421 is 1248999994.

It can be written as a sum of positive squares in 2 ways, for example, as 2082918321 + 2917080100 = 45639^2 + 54010^2 .

It is not a de Polignac number, because 4999998421 - 2⁵ = 4999998389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4999998461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 498970 + ... + 508891.

It is an arithmetic number, because the mean of its divisors is an integer number (469159761).

Almost surely, 2^4999998421 is an apocalyptic number.

4999998421 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

4999998421 is a deficient number, since it is larger than the sum of its proper divisors (629918711).

4999998421 is a wasteful number, since it uses less digits than its factorization.

4999998421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1007924 (or 1007913 counting only the distinct ones).

The product of its digits is 15116544, while the sum is 64.

The square root of 4999998421 is about 70710.6669534378. Note that the first 3 decimals coincide. The cubic root of 4999998421 is about 1709.9757666732.

It can be divided in two parts, 49999984 and 21, that added together give a palindrome (50000005).

The spelling of 4999998421 in words is "four billion, nine hundred ninety-nine million, nine hundred ninety-eight thousand, four hundred twenty-one".