421454977 has 2 divisors, whose sum is σ = 421454978. Its totient is φ = 421454976.

The previous prime is 421454953. The next prime is 421454983. The reversal of 421454977 is 779454124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 401240961 + 20214016 = 20031^2 + 4496^2 .

It is a cyclic number.

It is not a de Polignac number, because 421454977 - 2¹⁹ = 420930689 is a prime.

It is not a weakly prime, because it can be changed into another prime (421454927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210727488 + 210727489.

It is an arithmetic number, because the mean of its divisors is an integer number (210727489).

Almost surely, 2^421454977 is an apocalyptic number.

It is an amenable number.

421454977 is a deficient number, since it is larger than the sum of its proper divisors (1).

421454977 is an equidigital number, since it uses as much as digits as its factorization.

421454977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 282240, while the sum is 43.

The square root of 421454977 is about 20529.3686459180. The cubic root of 421454977 is about 749.7510148325.

The spelling of 421454977 in words is "four hundred twenty-one million, four hundred fifty-four thousand, nine hundred seventy-seven".