87859313 has 2 divisors, whose sum is σ = 87859314. Its totient is φ = 87859312.

The previous prime is 87859253. The next prime is 87859327. The reversal of 87859313 is 31395878.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85063729 + 2795584 = 9223^2 + 1672^2 .

It is a cyclic number.

It is not a de Polignac number, because 87859313 - 2¹² = 87855217 is a prime.

It is not a weakly prime, because it can be changed into another prime (87859393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43929656 + 43929657.

It is an arithmetic number, because the mean of its divisors is an integer number (43929657).

Almost surely, 2^87859313 is an apocalyptic number.

It is an amenable number.

87859313 is a deficient number, since it is larger than the sum of its proper divisors (1).

87859313 is an equidigital number, since it uses as much as digits as its factorization.

87859313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 44.

The square root of 87859313 is about 9373.3298779036. The cubic root of 87859313 is about 444.5588575280.

The spelling of 87859313 in words is "eighty-seven million, eight hundred fifty-nine thousand, three hundred thirteen".