7487989 has 2 divisors, whose sum is σ = 7487990. Its totient is φ = 7487988.

The previous prime is 7487969. The next prime is 7488017. The reversal of 7487989 is 9897847.

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., 4765489 + 2722500 = 2183^2 + 1650^2 .

It is an emirp because it is prime and its reverse (9897847) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7487989 - 2¹¹ = 7485941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7487969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3743994 + 3743995.

It is an arithmetic number, because the mean of its divisors is an integer number (3743995).

Almost surely, 2^7487989 is an apocalyptic number.

It is an amenable number.

7487989 is a deficient number, since it is larger than the sum of its proper divisors (1).

7487989 is an equidigital number, since it uses as much as digits as its factorization.

7487989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1016064, while the sum is 52.

The square root of 7487989 is about 2736.4190103126. The cubic root of 7487989 is about 195.6388340613.

The spelling of 7487989 in words is "seven million, four hundred eighty-seven thousand, nine hundred eighty-nine".