87120611 has 4 divisors (see below), whose sum is σ = 90124800. Its totient is φ = 84116424.

The previous prime is 87120599. The next prime is 87120617. The reversal of 87120611 is 11602178.

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 87120611 - 2⁶ = 87120547 is a prime.

It is a super-2 number, since 2×87120611² = 15180001722026642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87120617) 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, 1502051 + ... + 1502108.

It is an arithmetic number, because the mean of its divisors is an integer number (22531200).

Almost surely, 2^87120611 is an apocalyptic number.

87120611 is a deficient number, since it is larger than the sum of its proper divisors (3004189).

87120611 is a wasteful number, since it uses less digits than its factorization.

87120611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3004188.

The product of its (nonzero) digits is 672, while the sum is 26.

The square root of 87120611 is about 9333.8422420780. The cubic root of 87120611 is about 443.3094312526.

Adding to 87120611 its reverse (11602178), we get a palindrome (98722789).

The spelling of 87120611 in words is "eighty-seven million, one hundred twenty thousand, six hundred eleven".