421608433 has 2 divisors, whose sum is σ = 421608434. Its totient is φ = 421608432.

The previous prime is 421608431. The next prime is 421608479. The reversal of 421608433 is 334806124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 314423824 + 107184609 = 17732^2 + 10353^2 .

It is a cyclic number.

It is not a de Polignac number, because 421608433 - 2¹ = 421608431 is a prime.

Together with 421608431, it forms a pair of twin primes.

It is equal to p_22425529 and since 421608433 and 22425529 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 421608395 and 421608404.

It is not a weakly prime, because it can be changed into another prime (421608431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210804216 + 210804217.

It is an arithmetic number, because the mean of its divisors is an integer number (210804217).

Almost surely, 2^421608433 is an apocalyptic number.

It is an amenable number.

421608433 is a deficient number, since it is larger than the sum of its proper divisors (1).

421608433 is an equidigital number, since it uses as much as digits as its factorization.

421608433 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 421608433 is about 20533.1057806655. The cubic root of 421608433 is about 749.8420010878.

The spelling of 421608433 in words is "four hundred twenty-one million, six hundred eight thousand, four hundred thirty-three".