87981347 has 2 divisors, whose sum is σ = 87981348. Its totient is φ = 87981346.

The previous prime is 87981319. The next prime is 87981349. The reversal of 87981347 is 74318978.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87981347 - 2¹⁰ = 87980323 is a prime.

Together with 87981349, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (87981349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43990673 + 43990674.

It is an arithmetic number, because the mean of its divisors is an integer number (43990674).

Almost surely, 2^87981347 is an apocalyptic number.

87981347 is a deficient number, since it is larger than the sum of its proper divisors (1).

87981347 is an equidigital number, since it uses as much as digits as its factorization.

87981347 is an evil number, because the sum of its binary digits is even.

The product of its digits is 338688, while the sum is 47.

The square root of 87981347 is about 9379.8372587162. The cubic root of 87981347 is about 444.7645886957.

The spelling of 87981347 in words is "eighty-seven million, nine hundred eighty-one thousand, three hundred forty-seven".