87000061 has 4 divisors (see below), whose sum is σ = 89351452. Its totient is φ = 84648672.

The previous prime is 87000047. The next prime is 87000079. The reversal of 87000061 is 16000078.

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

It can be written as a sum of positive squares in 2 ways, for example, as 67551961 + 19448100 = 8219^2 + 4410^2 .

It is a cyclic number.

It is not a de Polignac number, because 87000061 - 2¹³ = 86991869 is a prime.

It is a super-2 number, since 2×87000061² = 15138021228007442, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 86999996 and 87000041.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87000961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1175640 + ... + 1175713.

It is an arithmetic number, because the mean of its divisors is an integer number (22337863).

Almost surely, 2^87000061 is an apocalyptic number.

It is an amenable number.

87000061 is a deficient number, since it is larger than the sum of its proper divisors (2351391).

87000061 is a wasteful number, since it uses less digits than its factorization.

87000061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2351390.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 87000061 is about 9327.3823230315. The cubic root of 87000061 is about 443.1048657302.

The spelling of 87000061 in words is "eighty-seven million, sixty-one", and thus it is an aban number and an uban number.