987050521 has 2 divisors, whose sum is σ = 987050522. Its totient is φ = 987050520.

The previous prime is 987050503. The next prime is 987050531. The reversal of 987050521 is 125050789.

987050521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 618218496 + 368832025 = 24864^2 + 19205^2 .

It is an emirp because it is prime and its reverse (125050789) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 987050521 - 2²³ = 978661913 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (987050501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 493525260 + 493525261.

It is an arithmetic number, because the mean of its divisors is an integer number (493525261).

Almost surely, 2^987050521 is an apocalyptic number.

It is an amenable number.

987050521 is a deficient number, since it is larger than the sum of its proper divisors (1).

987050521 is an equidigital number, since it uses as much as digits as its factorization.

987050521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25200, while the sum is 37.

The square root of 987050521 is about 31417.3601850951. The cubic root of 987050521 is about 995.6647396776.

The spelling of 987050521 in words is "nine hundred eighty-seven million, fifty thousand, five hundred twenty-one".