427047919 has 2 divisors, whose sum is σ = 427047920. Its totient is φ = 427047918.

The previous prime is 427047827. The next prime is 427047931. The reversal of 427047919 is 919740724.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 427047919 - 2²⁵ = 393493487 is a prime.

It is a super-2 number, since 2×427047919² = 364739850244461122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (427047949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213523959 + 213523960.

It is an arithmetic number, because the mean of its divisors is an integer number (213523960).

Almost surely, 2^427047919 is an apocalyptic number.

427047919 is a deficient number, since it is larger than the sum of its proper divisors (1).

427047919 is an equidigital number, since it uses as much as digits as its factorization.

427047919 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 127008, while the sum is 43.

The square root of 427047919 is about 20665.1377687157. The cubic root of 427047919 is about 753.0529889631.

The spelling of 427047919 in words is "four hundred twenty-seven million, forty-seven thousand, nine hundred nineteen".