87681761 has 8 divisors (see below), whose sum is σ = 92061120. Its totient is φ = 83392848.

The previous prime is 87681731. The next prime is 87681787. The reversal of 87681761 is 16718678.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87681761 is a prime.

It is a super-2 number, since 2×87681761² = 15376182424122242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87681721) 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, 20621 + ... + 24506.

It is an arithmetic number, because the mean of its divisors is an integer number (11507640).

Almost surely, 2^87681761 is an apocalyptic number.

It is an amenable number.

87681761 is a deficient number, since it is larger than the sum of its proper divisors (4379359).

87681761 is a wasteful number, since it uses less digits than its factorization.

87681761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45223.

The product of its digits is 112896, while the sum is 44.

The square root of 87681761 is about 9363.8539608433. The cubic root of 87681761 is about 444.2591907770.

The spelling of 87681761 in words is "eighty-seven million, six hundred eighty-one thousand, seven hundred sixty-one".