87285904393 has 4 divisors (see below), whose sum is σ = 87287045248. Its totient is φ = 87284763540.

The previous prime is 87285904369. The next prime is 87285904423. The reversal of 87285904393 is 39340958278.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87285904393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87285904793) 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, 446721 + ... + 611662.

It is an arithmetic number, because the mean of its divisors is an integer number (21821761312).

Almost surely, 2^87285904393 is an apocalyptic number.

It is an amenable number.

87285904393 is a deficient number, since it is larger than the sum of its proper divisors (1140855).

87285904393 is a wasteful number, since it uses less digits than its factorization.

87285904393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1140854.

The product of its (nonzero) digits is 13063680, while the sum is 58.

The spelling of 87285904393 in words is "eighty-seven billion, two hundred eighty-five million, nine hundred four thousand, three hundred ninety-three".