4086219421 has 2 divisors, whose sum is σ = 4086219422. Its totient is φ = 4086219420.

The previous prime is 4086219413. The next prime is 4086219443. The reversal of 4086219421 is 1249126804.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3001834521 + 1084384900 = 54789^2 + 32930^2 .

It is a cyclic number.

It is not a de Polignac number, because 4086219421 - 2³ = 4086219413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4086219481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2043109710 + 2043109711.

It is an arithmetic number, because the mean of its divisors is an integer number (2043109711).

Almost surely, 2^4086219421 is an apocalyptic number.

It is an amenable number.

4086219421 is a deficient number, since it is larger than the sum of its proper divisors (1).

4086219421 is an equidigital number, since it uses as much as digits as its factorization.

4086219421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 4086219421 is about 63923.5435579099. The cubic root of 4086219421 is about 1598.7254721156.

The spelling of 4086219421 in words is "four billion, eighty-six million, two hundred nineteen thousand, four hundred twenty-one".