87193071 has 32 divisors (see below), whose sum is σ = 155404800. Its totient is φ = 47200320.

The previous prime is 87193061. The next prime is 87193081. The reversal of 87193071 is 17039178.

It is an interprime number because it is at equal distance from previous prime (87193061) and next prime (87193081).

It is not a de Polignac number, because 87193071 - 2⁹ = 87192559 is a prime.

It is a super-2 number, since 2×87193071² = 15205263260822082, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87193061) 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 31 ways as a sum of consecutive naturals, for example, 8550 + ... + 15731.

It is an arithmetic number, because the mean of its divisors is an integer number (4856400).

Almost surely, 2^87193071 is an apocalyptic number.

87193071 is a deficient number, since it is larger than the sum of its proper divisors (68211729).

87193071 is a wasteful number, since it uses less digits than its factorization.

87193071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24316 (or 24310 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 36.

The square root of 87193071 is about 9337.7230093851. The cubic root of 87193071 is about 443.4323003784.

The spelling of 87193071 in words is "eighty-seven million, one hundred ninety-three thousand, seventy-one".