87816349 has 2 divisors, whose sum is σ = 87816350. Its totient is φ = 87816348.

The previous prime is 87816343. The next prime is 87816353. The reversal of 87816349 is 94361878.

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., 63313849 + 24502500 = 7957^2 + 4950^2 .

It is a cyclic number.

It is not a de Polignac number, because 87816349 - 2³ = 87816341 is a prime.

It is a super-2 number, since 2×87816349² = 15423422303379602, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 87816299 and 87816308.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87816341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43908174 + 43908175.

It is an arithmetic number, because the mean of its divisors is an integer number (43908175).

Almost surely, 2^87816349 is an apocalyptic number.

It is an amenable number.

87816349 is a deficient number, since it is larger than the sum of its proper divisors (1).

87816349 is an equidigital number, since it uses as much as digits as its factorization.

87816349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 46.

The square root of 87816349 is about 9371.0377760417. The cubic root of 87816349 is about 444.4863812766.

The spelling of 87816349 in words is "eighty-seven million, eight hundred sixteen thousand, three hundred forty-nine".