6989870 has 16 divisors (see below), whose sum is σ = 13016160. Its totient is φ = 2699424.

The previous prime is 6989869. The next prime is 6989921. The reversal of 6989870 is 789896.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 11762 + ... + 12341.

It is an arithmetic number, because the mean of its divisors is an integer number (813510).

Almost surely, 2^6989870 is an apocalyptic number.

6989870 is a deficient number, since it is larger than the sum of its proper divisors (6026290).

6989870 is a wasteful number, since it uses less digits than its factorization.

6989870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24139.

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 6989870 is about 2643.8362279082. The cubic root of 6989870 is about 191.2007975726.

The spelling of 6989870 in words is "six million, nine hundred eighty-nine thousand, eight hundred seventy".