5239987 has 2 divisors, whose sum is σ = 5239988. Its totient is φ = 5239986.

The previous prime is 5239943. The next prime is 5240017. The reversal of 5239987 is 7899325.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5239987 - 2¹⁹ = 4715699 is a prime.

It is not a weakly prime, because it can be changed into another prime (5239907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2619993 + 2619994.

It is an arithmetic number, because the mean of its divisors is an integer number (2619994).

Almost surely, 2^5239987 is an apocalyptic number.

5239987 is a deficient number, since it is larger than the sum of its proper divisors (1).

5239987 is an equidigital number, since it uses as much as digits as its factorization.

5239987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 43.

The square root of 5239987 is about 2289.1017889120. The cubic root of 5239987 is about 173.6907684167.

It can be divided in two parts, 523998 and 7, that multiplied together give a triangular number (3667986 = T₂₇₀₈).

The spelling of 5239987 in words is "five million, two hundred thirty-nine thousand, nine hundred eighty-seven".