87310247 has 4 divisors (see below), whose sum is σ = 88415520. Its totient is φ = 86204976.

The previous prime is 87310243. The next prime is 87310259. The reversal of 87310247 is 74201378.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 87310247 - 2² = 87310243 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 (87310243) 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, 552518 + ... + 552675.

It is an arithmetic number, because the mean of its divisors is an integer number (22103880).

Almost surely, 2^87310247 is an apocalyptic number.

87310247 is a deficient number, since it is larger than the sum of its proper divisors (1105273).

87310247 is a wasteful number, since it uses less digits than its factorization.

87310247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1105272.

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 87310247 is about 9343.9952375844. The cubic root of 87310247 is about 443.6308496605.

The spelling of 87310247 in words is "eighty-seven million, three hundred ten thousand, two hundred forty-seven".