7910989 has 2 divisors, whose sum is σ = 7910990. Its totient is φ = 7910988.

The previous prime is 7910977. The next prime is 7911037. The reversal of 7910989 is 9890197.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4338889 + 3572100 = 2083^2 + 1890^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7910989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7910789) 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, 3955494 + 3955495.

It is an arithmetic number, because the mean of its divisors is an integer number (3955495).

Almost surely, 2^7910989 is an apocalyptic number.

It is an amenable number.

7910989 is a deficient number, since it is larger than the sum of its proper divisors (1).

7910989 is an equidigital number, since it uses as much as digits as its factorization.

7910989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 43.

The square root of 7910989 is about 2812.6480405483. The cubic root of 7910989 is about 199.2554735074.

It can be divided in two parts, 7910 and 989, that multiplied together give a triangular number (7822990 = T₃₉₅₅).

The spelling of 7910989 in words is "seven million, nine hundred ten thousand, nine hundred eighty-nine".