5128987 has 2 divisors, whose sum is σ = 5128988. Its totient is φ = 5128986.

The previous prime is 5128973. The next prime is 5128999. The reversal of 5128987 is 7898215.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5128987 - 2⁷ = 5128859 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (5128967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2564493 + 2564494.

It is an arithmetic number, because the mean of its divisors is an integer number (2564494).

Almost surely, 2^5128987 is an apocalyptic number.

5128987 is a deficient number, since it is larger than the sum of its proper divisors (1).

5128987 is an equidigital number, since it uses as much as digits as its factorization.

5128987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 40.

The square root of 5128987 is about 2264.7266943276. The cubic root of 5128987 is about 172.4555595104.

The spelling of 5128987 in words is "five million, one hundred twenty-eight thousand, nine hundred eighty-seven".