7404016421 has 2 divisors, whose sum is σ = 7404016422. Its totient is φ = 7404016420.

The previous prime is 7404016357. The next prime is 7404016423. The reversal of 7404016421 is 1246104047.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5453822500 + 1950193921 = 73850^2 + 44161^2 .

It is an emirp because it is prime and its reverse (1246104047) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7404016421 - 2⁶ = 7404016357 is a prime.

It is a Sophie Germain prime.

Together with 7404016423, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7404016423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3702008210 + 3702008211.

It is an arithmetic number, because the mean of its divisors is an integer number (3702008211).

Almost surely, 2^7404016421 is an apocalyptic number.

It is an amenable number.

7404016421 is a deficient number, since it is larger than the sum of its proper divisors (1).

7404016421 is an equidigital number, since it uses as much as digits as its factorization.

7404016421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 7404016421 is about 86046.5944764812. The cubic root of 7404016421 is about 1949.0476542743.

The spelling of 7404016421 in words is "seven billion, four hundred four million, sixteen thousand, four hundred twenty-one".