421233047 has 2 divisors, whose sum is σ = 421233048. Its totient is φ = 421233046.

The previous prime is 421233019. The next prime is 421233061. The reversal of 421233047 is 740332124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 421233047 - 2¹⁶ = 421167511 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421233067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210616523 + 210616524.

It is an arithmetic number, because the mean of its divisors is an integer number (210616524).

Almost surely, 2^421233047 is an apocalyptic number.

421233047 is a deficient number, since it is larger than the sum of its proper divisors (1).

421233047 is an equidigital number, since it uses as much as digits as its factorization.

421233047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 26.

The square root of 421233047 is about 20523.9627508919. The cubic root of 421233047 is about 749.6193902884.

The spelling of 421233047 in words is "four hundred twenty-one million, two hundred thirty-three thousand, forty-seven".