87241383987 has 4 divisors (see below), whose sum is σ = 116321845320. Its totient is φ = 58160922656.

The previous prime is 87241383949. The next prime is 87241384031. The reversal of 87241383987 is 78938314278.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 87241383987 - 2¹⁸ = 87241121843 is a prime.

It is a super-2 number, since 2×87241383987² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 87241383987.

It is not an unprimeable number, because it can be changed into a prime (87241383787) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14540230662 + ... + 14540230667.

It is an arithmetic number, because the mean of its divisors is an integer number (29080461330).

Almost surely, 2^87241383987 is an apocalyptic number.

87241383987 is a deficient number, since it is larger than the sum of its proper divisors (29080461333).

87241383987 is a wasteful number, since it uses less digits than its factorization.

87241383987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29080461332.

The product of its digits is 16257024, while the sum is 60.

The spelling of 87241383987 in words is "eighty-seven billion, two hundred forty-one million, three hundred eighty-three thousand, nine hundred eighty-seven".