87143705 has 8 divisors (see below), whose sum is σ = 114079104. Its totient is φ = 63377200.

The previous prime is 87143699. The next prime is 87143729. The reversal of 87143705 is 50734178.

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

It is not a de Polignac number, because 87143705 - 2²⁶ = 20034841 is a prime.

It is a super-2 number, since 2×87143705² = 15188050642254050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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, 792161 + ... + 792270.

It is an arithmetic number, because the mean of its divisors is an integer number (14259888).

Almost surely, 2^87143705 is an apocalyptic number.

It is an amenable number.

87143705 is a deficient number, since it is larger than the sum of its proper divisors (26935399).

87143705 is a wasteful number, since it uses less digits than its factorization.

87143705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1584447.

The product of its (nonzero) digits is 23520, while the sum is 35.

The square root of 87143705 is about 9335.0792712221. The cubic root of 87143705 is about 443.3485987294.

The spelling of 87143705 in words is "eighty-seven million, one hundred forty-three thousand, seven hundred five".