87861611 has 4 divisors (see below), whose sum is σ = 88226424. Its totient is φ = 87496800.

The previous prime is 87861607. The next prime is 87861623. The reversal of 87861611 is 11616878.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 87861611 - 2² = 87861607 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87861691) 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, 182045 + ... + 182526.

It is an arithmetic number, because the mean of its divisors is an integer number (22056606).

Almost surely, 2^87861611 is an apocalyptic number.

87861611 is a deficient number, since it is larger than the sum of its proper divisors (364813).

87861611 is a wasteful number, since it uses less digits than its factorization.

87861611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364812.

The product of its digits is 16128, while the sum is 38.

The square root of 87861611 is about 9373.4524589396. The cubic root of 87861611 is about 444.5627333734.

The spelling of 87861611 in words is "eighty-seven million, eight hundred sixty-one thousand, six hundred eleven".