6989121 has 6 divisors (see below), whose sum is σ = 10095410. Its totient is φ = 4659408.

The previous prime is 6989119. The next prime is 6989123. The reversal of 6989121 is 1219896.

It is an interprime number because it is at equal distance from previous prime (6989119) and next prime (6989123).

It can be written as a sum of positive squares in only one way, i.e., 5948721 + 1040400 = 2439^2 + 1020^2 .

It is not a de Polignac number, because 6989121 - 2¹ = 6989119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6989123) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 388276 + ... + 388293.

Almost surely, 2^6989121 is an apocalyptic number.

It is an amenable number.

6989121 is a deficient number, since it is larger than the sum of its proper divisors (3106289).

6989121 is a wasteful number, since it uses less digits than its factorization.

6989121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 776575 (or 776572 counting only the distinct ones).

The product of its digits is 7776, while the sum is 36.

The square root of 6989121 is about 2643.6945738871. The cubic root of 6989121 is about 191.1939679504.

The spelling of 6989121 in words is "six million, nine hundred eighty-nine thousand, one hundred twenty-one".