416203421 has 2 divisors, whose sum is σ = 416203422. Its totient is φ = 416203420.

The previous prime is 416203399. The next prime is 416203433. The reversal of 416203421 is 124302614.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 300640921 + 115562500 = 17339^2 + 10750^2 .

It is a cyclic number.

It is not a de Polignac number, because 416203421 - 2¹⁸ = 415941277 is a prime.

It is a Sophie Germain 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 (416203481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 208101710 + 208101711.

It is an arithmetic number, because the mean of its divisors is an integer number (208101711).

Almost surely, 2^416203421 is an apocalyptic number.

It is an amenable number.

416203421 is a deficient number, since it is larger than the sum of its proper divisors (1).

416203421 is an equidigital number, since it uses as much as digits as its factorization.

416203421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 416203421 is about 20401.0642124375. The cubic root of 416203421 is about 746.6238896048.

The spelling of 416203421 in words is "four hundred sixteen million, two hundred three thousand, four hundred twenty-one".