427247999 has 8 divisors (see below), whose sum is σ = 435860352. Its totient is φ = 418656160.

The previous prime is 427247987. The next prime is 427248011. The reversal of 427247999 is 999742724.

It is an interprime number because it is at equal distance from previous prime (427247987) and next prime (427248011).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-427247999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 427247999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (427247959) 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 in 7 ways as a sum of consecutive naturals, for example, 41069 + ... + 50409.

It is an arithmetic number, because the mean of its divisors is an integer number (54482544).

Almost surely, 2^427247999 is an apocalyptic number.

427247999 is a deficient number, since it is larger than the sum of its proper divisors (8612353).

427247999 is an equidigital number, since it uses as much as digits as its factorization.

427247999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10257.

The product of its digits is 2286144, while the sum is 53.

The square root of 427247999 is about 20669.9782051167. The cubic root of 427247999 is about 753.1705771078.

The spelling of 427247999 in words is "four hundred twenty-seven million, two hundred forty-seven thousand, nine hundred ninety-nine".