87206731 has 8 divisors (see below), whose sum is σ = 92358144. Its totient is φ = 82168680.

The previous prime is 87206729. The next prime is 87206767. The reversal of 87206731 is 13760278.

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 87206731 - 2¹ = 87206729 is a prime.

It is a super-2 number, since 2×87206731² = 15210027863412722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87206711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26755 + ... + 29836.

It is an arithmetic number, because the mean of its divisors is an integer number (11544768).

Almost surely, 2^87206731 is an apocalyptic number.

87206731 is a deficient number, since it is larger than the sum of its proper divisors (5151413).

87206731 is a wasteful number, since it uses less digits than its factorization.

87206731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56681.

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 87206731 is about 9338.4544224406. The cubic root of 87206731 is about 443.4554557693.

It can be divided in two parts, 8720 and 6731, that added together give a palindrome (15451).

The spelling of 87206731 in words is "eighty-seven million, two hundred six thousand, seven hundred thirty-one".