421244347 has 2 divisors, whose sum is σ = 421244348. Its totient is φ = 421244346.

The previous prime is 421244311. The next prime is 421244357. The reversal of 421244347 is 743442124.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421244347 is a prime.

It is not a weakly prime, because it can be changed into another prime (421244357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210622173 + 210622174.

It is an arithmetic number, because the mean of its divisors is an integer number (210622174).

Almost surely, 2^421244347 is an apocalyptic number.

421244347 is a deficient number, since it is larger than the sum of its proper divisors (1).

421244347 is an equidigital number, since it uses as much as digits as its factorization.

421244347 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21504, while the sum is 31.

The square root of 421244347 is about 20524.2380370137. The cubic root of 421244347 is about 749.6260933264.

The spelling of 421244347 in words is "four hundred twenty-one million, two hundred forty-four thousand, three hundred forty-seven".