87813761 has 8 divisors (see below), whose sum is σ = 100421184. Its totient is φ = 75222000.

The previous prime is 87813749. The next prime is 87813767. The reversal of 87813761 is 16731878.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-87813761 is a prime.

It is a super-3 number, since 3×87813761³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87813767) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12971 + ... + 18543.

It is an arithmetic number, because the mean of its divisors is an integer number (12552648).

Almost surely, 2^87813761 is an apocalyptic number.

It is an amenable number.

87813761 is a deficient number, since it is larger than the sum of its proper divisors (12607423).

87813761 is a wasteful number, since it uses less digits than its factorization.

87813761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7831.

The product of its digits is 56448, while the sum is 41.

The square root of 87813761 is about 9370.8996899978. The cubic root of 87813761 is about 444.4820148078.

The spelling of 87813761 in words is "eighty-seven million, eight hundred thirteen thousand, seven hundred sixty-one".