7019998421 has 4 divisors (see below), whose sum is σ = 7040229312. Its totient is φ = 6999767532.

The previous prime is 7019998417. The next prime is 7019998423. The reversal of 7019998421 is 1248999107.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7019998421 - 2² = 7019998417 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7019998421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7019998423) 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 3 ways as a sum of consecutive naturals, for example, 10114925 + ... + 10115618.

It is an arithmetic number, because the mean of its divisors is an integer number (1760057328).

Almost surely, 2^7019998421 is an apocalyptic number.

It is an amenable number.

7019998421 is a deficient number, since it is larger than the sum of its proper divisors (20230891).

7019998421 is a wasteful number, since it uses less digits than its factorization.

7019998421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20230890.

The product of its (nonzero) digits is 326592, while the sum is 50.

The square root of 7019998421 is about 83785.4308397349. The cubic root of 7019998421 is about 1914.7511460971.

The spelling of 7019998421 in words is "seven billion, nineteen million, nine hundred ninety-eight thousand, four hundred twenty-one".