87490594133 has 4 divisors (see below), whose sum is σ = 87491277228. Its totient is φ = 87489911040.

The previous prime is 87490594123. The next prime is 87490594187. The reversal of 87490594133 is 33149509478.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 16517904484 + 70972689649 = 128522^2 + 266407^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87490594133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87490594123) 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, 85388 + ... + 426933.

It is an arithmetic number, because the mean of its divisors is an integer number (21872819307).

Almost surely, 2^87490594133 is an apocalyptic number.

It is an amenable number.

87490594133 is a deficient number, since it is larger than the sum of its proper divisors (683095).

87490594133 is a wasteful number, since it uses less digits than its factorization.

87490594133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 683094.

The product of its (nonzero) digits is 3265920, while the sum is 53.

The spelling of 87490594133 in words is "eighty-seven billion, four hundred ninety million, five hundred ninety-four thousand, one hundred thirty-three".