87206071 has 4 divisors (see below), whose sum is σ = 88684200. Its totient is φ = 85727944.

The previous prime is 87206047. The next prime is 87206099. The reversal of 87206071 is 17060278.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-87206071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87206671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 738976 + ... + 739093.

It is an arithmetic number, because the mean of its divisors is an integer number (22171050).

Almost surely, 2^87206071 is an apocalyptic number.

87206071 is a deficient number, since it is larger than the sum of its proper divisors (1478129).

87206071 is a wasteful number, since it uses less digits than its factorization.

87206071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1478128.

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 87206071 is about 9338.4190846203. The cubic root of 87206071 is about 443.4543370432.

The spelling of 87206071 in words is "eighty-seven million, two hundred six thousand, seventy-one".