87791339 has 2 divisors, whose sum is σ = 87791340. Its totient is φ = 87791338.

The previous prime is 87791273. The next prime is 87791369. The reversal of 87791339 is 93319778.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87791339 - 2⁸ = 87791083 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 87791293 and 87791302.

It is not a weakly prime, because it can be changed into another prime (87791369) 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, 43895669 + 43895670.

It is an arithmetic number, because the mean of its divisors is an integer number (43895670).

Almost surely, 2^87791339 is an apocalyptic number.

87791339 is a deficient number, since it is larger than the sum of its proper divisors (1).

87791339 is an equidigital number, since it uses as much as digits as its factorization.

87791339 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 285768, while the sum is 47.

The square root of 87791339 is about 9369.7032503703. The cubic root of 87791339 is about 444.4441808586. Note that the first 3 decimals are identical.

The spelling of 87791339 in words is "eighty-seven million, seven hundred ninety-one thousand, three hundred thirty-nine".