87205113 has 8 divisors (see below), whose sum is σ = 129192800. Its totient is φ = 58136724.

The previous prime is 87205103. The next prime is 87205133. The reversal of 87205113 is 31150278.

It is not a de Polignac number, because 87205113 - 2⁸ = 87204857 is a prime.

It is a super-4 number, since 4×87205113⁴ (a number of 33 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 3229819 = 87205113 / (8 + 7 + 2 + 0 + 5 + 1 + 1 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87205103) 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, 1614883 + ... + 1614936.

It is an arithmetic number, because the mean of its divisors is an integer number (16149100).

Almost surely, 2^87205113 is an apocalyptic number.

It is an amenable number.

87205113 is a deficient number, since it is larger than the sum of its proper divisors (41987687).

87205113 is a wasteful number, since it uses less digits than its factorization.

87205113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3229828 (or 3229822 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 87205113 is about 9338.3677910007. The cubic root of 87205113 is about 443.4527131853.

The spelling of 87205113 in words is "eighty-seven million, two hundred five thousand, one hundred thirteen".