87201440439 has 4 divisors (see below), whose sum is σ = 116268587256. Its totient is φ = 58134293624.

The previous prime is 87201440413. The next prime is 87201440477. The reversal of 87201440439 is 93404410278.

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 87201440439 - 2¹³ = 87201432247 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87201440439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87201440239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14533573404 + ... + 14533573409.

It is an arithmetic number, because the mean of its divisors is an integer number (29067146814).

Almost surely, 2^87201440439 is an apocalyptic number.

87201440439 is a deficient number, since it is larger than the sum of its proper divisors (29067146817).

87201440439 is a wasteful number, since it uses less digits than its factorization.

87201440439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29067146816.

The product of its (nonzero) digits is 193536, while the sum is 42.

The spelling of 87201440439 in words is "eighty-seven billion, two hundred one million, four hundred forty thousand, four hundred thirty-nine".