6899649 has 16 divisors (see below), whose sum is σ = 9612480. Its totient is φ = 4397760.

The previous prime is 6899617. The next prime is 6899657. The reversal of 6899649 is 9469986.

It is not a de Polignac number, because 6899649 - 2⁵ = 6899617 is a prime.

It is a Curzon number.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (6899749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6262 + ... + 7280.

It is an arithmetic number, because the mean of its divisors is an integer number (600780).

Almost surely, 2^6899649 is an apocalyptic number.

It is an amenable number.

6899649 is a deficient number, since it is larger than the sum of its proper divisors (2712831).

6899649 is a wasteful number, since it uses less digits than its factorization.

6899649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1120.

The product of its digits is 839808, while the sum is 51.

The square root of 6899649 is about 2626.7182947549. The cubic root of 6899649 is about 190.3745979958.

The spelling of 6899649 in words is "six million, eight hundred ninety-nine thousand, six hundred forty-nine".