421709147 has 2 divisors, whose sum is σ = 421709148. Its totient is φ = 421709146.

The previous prime is 421709137. The next prime is 421709177. The reversal of 421709147 is 741907124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 421709147 - 2⁶ = 421709083 is a prime.

It is not a weakly prime, because it can be changed into another prime (421709137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210854573 + 210854574.

It is an arithmetic number, because the mean of its divisors is an integer number (210854574).

Almost surely, 2^421709147 is an apocalyptic number.

421709147 is a deficient number, since it is larger than the sum of its proper divisors (1).

421709147 is an equidigital number, since it uses as much as digits as its factorization.

421709147 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14112, while the sum is 35.

The square root of 421709147 is about 20535.5581126981. The cubic root of 421709147 is about 749.9017038585.

The spelling of 421709147 in words is "four hundred twenty-one million, seven hundred nine thousand, one hundred forty-seven".