87550513 has 4 divisors (see below), whose sum is σ = 89034480. Its totient is φ = 86066548.

The previous prime is 87550501. The next prime is 87550531. The reversal of 87550513 is 31505578.

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 not a de Polignac number, because 87550513 - 2⁵ = 87550481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87550553) 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, 741895 + ... + 742012.

It is an arithmetic number, because the mean of its divisors is an integer number (22258620).

Almost surely, 2^87550513 is an apocalyptic number.

It is an amenable number.

87550513 is a deficient number, since it is larger than the sum of its proper divisors (1483967).

87550513 is a wasteful number, since it uses less digits than its factorization.

87550513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1483966.

The product of its (nonzero) digits is 21000, while the sum is 34.

The square root of 87550513 is about 9356.8431107933. The cubic root of 87550513 is about 444.0374143322.

The spelling of 87550513 in words is "eighty-seven million, five hundred fifty thousand, five hundred thirteen".