542509987 has 2 divisors, whose sum is σ = 542509988. Its totient is φ = 542509986.

The previous prime is 542509963. The next prime is 542510029. The reversal of 542509987 is 789905245.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 542509987 - 2⁷ = 542509859 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 542509987.

It is not a weakly prime, because it can be changed into another prime (542509927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271254993 + 271254994.

It is an arithmetic number, because the mean of its divisors is an integer number (271254994).

Almost surely, 2^542509987 is an apocalyptic number.

542509987 is a deficient number, since it is larger than the sum of its proper divisors (1).

542509987 is an equidigital number, since it uses as much as digits as its factorization.

542509987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 907200, while the sum is 49.

The square root of 542509987 is about 23291.8437870427. The cubic root of 542509987 is about 815.5850301596.

The spelling of 542509987 in words is "five hundred forty-two million, five hundred nine thousand, nine hundred eighty-seven".