6427899 has 24 divisors (see below), whose sum is σ = 9682400. Its totient is φ = 4105728.

The previous prime is 6427891. The next prime is 6427907. The reversal of 6427899 is 9987246.

It is a happy number.

6427899 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (6427891) and next prime (6427907).

It is not a de Polignac number, because 6427899 - 2³ = 6427891 is a prime.

It is a d-powerful number, because it can be written as 6⁶ + 4⁴ + 2¹⁹ + 7⁸ + 8⁵ + 9² + 9⁵ .

It is a Duffinian number.

Its product of digits (217728) is a multiple of the sum of its prime divisors (336).

It is not an unprimeable number, because it can be changed into a prime (6427891) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32202 + ... + 32400.

Almost surely, 2^6427899 is an apocalyptic number.

6427899 is a deficient number, since it is larger than the sum of its proper divisors (3254501).

6427899 is a wasteful number, since it uses less digits than its factorization.

6427899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339 (or 336 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 6427899 is about 2535.3301560152. The cubic root of 6427899 is about 185.9329449582.

It can be divided in two parts, 642789 and 9, that multiplied together give a triangular number (5785101 = T₃₄₀₁).

The spelling of 6427899 in words is "six million, four hundred twenty-seven thousand, eight hundred ninety-nine".