8240989 has 2 divisors, whose sum is σ = 8240990. Its totient is φ = 8240988.

The previous prime is 8240983. The next prime is 8241001. The reversal of 8240989 is 9890428.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8076964 + 164025 = 2842^2 + 405^2 .

It is a cyclic number.

It is not a de Polignac number, because 8240989 - 2⁵ = 8240957 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8240983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4120494 + 4120495.

It is an arithmetic number, because the mean of its divisors is an integer number (4120495).

Almost surely, 2^8240989 is an apocalyptic number.

It is an amenable number.

8240989 is a deficient number, since it is larger than the sum of its proper divisors (1).

8240989 is an equidigital number, since it uses as much as digits as its factorization.

8240989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 8240989 is about 2870.7122809505. The cubic root of 8240989 is about 201.9884073339.

It can be divided in two parts, 8240 and 989, that added together give a palindrome (9229).

The spelling of 8240989 in words is "eight million, two hundred forty thousand, nine hundred eighty-nine".