7031989 has 2 divisors, whose sum is σ = 7031990. Its totient is φ = 7031988.

The previous prime is 7031977. The next prime is 7032013. The reversal of 7031989 is 9891307.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4906225 + 2125764 = 2215^2 + 1458^2 .

It is an emirp because it is prime and its reverse (9891307) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7031989 - 2⁷ = 7031861 is a prime.

It is a super-2 number, since 2×7031989² = 98897738592242, which contains 22 as substring.

It is a Chen prime.

7031989 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7031909) 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 as a sum of consecutive naturals, namely, 3515994 + 3515995.

It is an arithmetic number, because the mean of its divisors is an integer number (3515995).

Almost surely, 2^7031989 is an apocalyptic number.

It is an amenable number.

7031989 is a deficient number, since it is larger than the sum of its proper divisors (1).

7031989 is an equidigital number, since it uses as much as digits as its factorization.

7031989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 7031989 is about 2651.7897729647. The cubic root of 7031989 is about 191.5840695986.

The spelling of 7031989 in words is "seven million, thirty-one thousand, nine hundred eighty-nine".