421446307 has 2 divisors, whose sum is σ = 421446308. Its totient is φ = 421446306.

The previous prime is 421446293. The next prime is 421446313. The reversal of 421446307 is 703644124.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421446307 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (421446007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210723153 + 210723154.

It is an arithmetic number, because the mean of its divisors is an integer number (210723154).

Almost surely, 2^421446307 is an apocalyptic number.

421446307 is a deficient number, since it is larger than the sum of its proper divisors (1).

421446307 is an equidigital number, since it uses as much as digits as its factorization.

421446307 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 31.

The square root of 421446307 is about 20529.1574839300. The cubic root of 421446307 is about 749.7458736065.

The spelling of 421446307 in words is "four hundred twenty-one million, four hundred forty-six thousand, three hundred seven".