8407047421 has 2 divisors, whose sum is σ = 8407047422. Its totient is φ = 8407047420.

The previous prime is 8407047391. The next prime is 8407047443. The reversal of 8407047421 is 1247407048.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8272812025 + 134235396 = 90955^2 + 11586^2 .

It is a cyclic number.

It is not a de Polignac number, because 8407047421 - 2¹⁹ = 8406523133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8407047221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4203523710 + 4203523711.

It is an arithmetic number, because the mean of its divisors is an integer number (4203523711).

Almost surely, 2^8407047421 is an apocalyptic number.

It is an amenable number.

8407047421 is a deficient number, since it is larger than the sum of its proper divisors (1).

8407047421 is an equidigital number, since it uses as much as digits as its factorization.

8407047421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50176, while the sum is 37.

The square root of 8407047421 is about 91689.9526720349. The cubic root of 8407047421 is about 2033.3610446431.

The spelling of 8407047421 in words is "eight billion, four hundred seven million, forty-seven thousand, four hundred twenty-one".