87120613 has 8 divisors (see below), whose sum is σ = 89893440. Its totient is φ = 84378720.

The previous prime is 87120599. The next prime is 87120617. The reversal of 87120613 is 31602178.

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

It is a cyclic number.

It is not a de Polignac number, because 87120613 - 2⁵ = 87120581 is a prime.

It is a Duffinian number.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 1945 + ... + 13342.

It is an arithmetic number, because the mean of its divisors is an integer number (11236680).

Almost surely, 2^87120613 is an apocalyptic number.

It is an amenable number.

87120613 is a deficient number, since it is larger than the sum of its proper divisors (2772827).

87120613 is a wasteful number, since it uses less digits than its factorization.

87120613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15467.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 87120613 is about 9333.8423492150. The cubic root of 87120613 is about 443.3094346449.

The spelling of 87120613 in words is "eighty-seven million, one hundred twenty thousand, six hundred thirteen".