420078947 has 2 divisors, whose sum is σ = 420078948. Its totient is φ = 420078946.

The previous prime is 420078943. The next prime is 420078979. The reversal of 420078947 is 749870024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420078947 - 2² = 420078943 is a prime.

It is not a weakly prime, because it can be changed into another prime (420078943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210039473 + 210039474.

It is an arithmetic number, because the mean of its divisors is an integer number (210039474).

Almost surely, 2^420078947 is an apocalyptic number.

420078947 is a deficient number, since it is larger than the sum of its proper divisors (1).

420078947 is an equidigital number, since it uses as much as digits as its factorization.

420078947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112896, while the sum is 41.

The square root of 420078947 is about 20495.8275509919. The cubic root of 420078947 is about 748.9341583225.

The spelling of 420078947 in words is "four hundred twenty million, seventy-eight thousand, nine hundred forty-seven".