421394947 has 2 divisors, whose sum is σ = 421394948. Its totient is φ = 421394946.

The previous prime is 421394923. The next prime is 421394971. The reversal of 421394947 is 749493124.

It is a balanced prime because it is at equal distance from previous prime (421394923) and next prime (421394971).

It is a cyclic number.

It is not a de Polignac number, because 421394947 - 2²³ = 413006339 is a prime.

It is not a weakly prime, because it can be changed into another prime (421394917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210697473 + 210697474.

It is an arithmetic number, because the mean of its divisors is an integer number (210697474).

Almost surely, 2^421394947 is an apocalyptic number.

421394947 is a deficient number, since it is larger than the sum of its proper divisors (1).

421394947 is an equidigital number, since it uses as much as digits as its factorization.

421394947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 43.

The square root of 421394947 is about 20527.9065420710. The cubic root of 421394947 is about 749.7154161779.

The spelling of 421394947 in words is "four hundred twenty-one million, three hundred ninety-four thousand, nine hundred forty-seven".