87731307 has 6 divisors (see below), whose sum is σ = 126723012. Its totient is φ = 58487532.

The previous prime is 87731297. The next prime is 87731323. The reversal of 87731307 is 70313778.

It is a happy number.

It is not a de Polignac number, because 87731307 - 2⁷ = 87731179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87731387) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4873953 + ... + 4873970.

It is an arithmetic number, because the mean of its divisors is an integer number (21120502).

Almost surely, 2^87731307 is an apocalyptic number.

87731307 is a deficient number, since it is larger than the sum of its proper divisors (38991705).

87731307 is a wasteful number, since it uses less digits than its factorization.

87731307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9747929 (or 9747926 counting only the distinct ones).

The product of its (nonzero) digits is 24696, while the sum is 36.

The square root of 87731307 is about 9366.4991859285. The cubic root of 87731307 is about 444.3428536390.

The spelling of 87731307 in words is "eighty-seven million, seven hundred thirty-one thousand, three hundred seven".