87310397 has 4 divisors (see below), whose sum is σ = 87364380. Its totient is φ = 87256416.

The previous prime is 87310393. The next prime is 87310403. The reversal of 87310397 is 79301378.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 67338436 + 19971961 = 8206^2 + 4469^2 .

It is a cyclic number.

It is not a de Polignac number, because 87310397 - 2² = 87310393 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87310397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87310393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24488 + ... + 27825.

It is an arithmetic number, because the mean of its divisors is an integer number (21841095).

Almost surely, 2^87310397 is an apocalyptic number.

It is an amenable number.

87310397 is a deficient number, since it is larger than the sum of its proper divisors (53983).

87310397 is a wasteful number, since it uses less digits than its factorization.

87310397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53982.

The product of its (nonzero) digits is 31752, while the sum is 38.

The square root of 87310397 is about 9344.0032641261. The cubic root of 87310397 is about 443.6311037147.

The spelling of 87310397 in words is "eighty-seven million, three hundred ten thousand, three hundred ninety-seven".