87061831 has 8 divisors (see below), whose sum is σ = 91141344. Its totient is φ = 83006880.

The previous prime is 87061817. The next prime is 87061859. The reversal of 87061831 is 13816078.

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 87061831 - 2⁹ = 87061319 is a prime.

It is a super-2 number, since 2×87061831² = 15159524834145122, 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 (87061801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1321 + ... + 13261.

It is an arithmetic number, because the mean of its divisors is an integer number (11392668).

Almost surely, 2^87061831 is an apocalyptic number.

87061831 is a deficient number, since it is larger than the sum of its proper divisors (4079513).

87061831 is a wasteful number, since it uses less digits than its factorization.

87061831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12281.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 87061831 is about 9330.6929539022. The cubic root of 87061831 is about 443.2097089993.

The spelling of 87061831 in words is "eighty-seven million, sixty-one thousand, eight hundred thirty-one".