7001989 has 4 divisors (see below), whose sum is σ = 7134156. Its totient is φ = 6869824.

The previous prime is 7001927. The next prime is 7001999. The reversal of 7001989 is 9891007.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9891007 = 7 ⋅1413001.

It can be written as a sum of positive squares in 2 ways, for example, as 3132900 + 3869089 = 1770^2 + 1967^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7001989 is a prime.

It is a super-2 number, since 2×7001989² = 98055699912242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7001999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66004 + ... + 66109.

It is an arithmetic number, because the mean of its divisors is an integer number (1783539).

Almost surely, 2^7001989 is an apocalyptic number.

It is an amenable number.

7001989 is a deficient number, since it is larger than the sum of its proper divisors (132167).

7001989 is a wasteful number, since it uses less digits than its factorization.

7001989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132166.

The product of its (nonzero) digits is 4536, while the sum is 34.

The square root of 7001989 is about 2646.1271700355. The cubic root of 7001989 is about 191.3112347525.

The spelling of 7001989 in words is "seven million, one thousand, nine hundred eighty-nine".