87219347 has 2 divisors, whose sum is σ = 87219348. Its totient is φ = 87219346.

The previous prime is 87219343. The next prime is 87219373. The reversal of 87219347 is 74391278.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87219347 - 2² = 87219343 is a prime.

It is a super-2 number, since 2×87219347² = 15214428982212818, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (87219343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43609673 + 43609674.

It is an arithmetic number, because the mean of its divisors is an integer number (43609674).

Almost surely, 2^87219347 is an apocalyptic number.

87219347 is a deficient number, since it is larger than the sum of its proper divisors (1).

87219347 is an equidigital number, since it uses as much as digits as its factorization.

87219347 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84672, while the sum is 41.

The square root of 87219347 is about 9339.1298845235. The cubic root of 87219347 is about 443.4768393032.

The spelling of 87219347 in words is "eighty-seven million, two hundred nineteen thousand, three hundred forty-seven".