61000087 has 16 divisors (see below), whose sum is σ = 65116800. Its totient is φ = 57058560.

The previous prime is 61000039. The next prime is 61000091. The reversal of 61000087 is 78000016.

It is a cyclic number.

It is not a de Polignac number, because 61000087 - 2⁷ = 60999959 is a prime.

It is a super-2 number, since 2×61000087² = 7442021228015138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61000787) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119589 + ... + 120097.

It is an arithmetic number, because the mean of its divisors is an integer number (4069800).

Almost surely, 2^61000087 is an apocalyptic number.

61000087 is a deficient number, since it is larger than the sum of its proper divisors (4116713).

61000087 is a wasteful number, since it uses less digits than its factorization.

61000087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666.

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

The square root of 61000087 is about 7810.2552455089. The cubic root of 61000087 is about 393.6499054551.

The spelling of 61000087 in words is "sixty-one million, eighty-seven", and thus it is an aban number and an uban number.