87398849 has 2 divisors, whose sum is σ = 87398850. Its totient is φ = 87398848.

The previous prime is 87398813. The next prime is 87398851. The reversal of 87398849 is 94889378.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59783824 + 27615025 = 7732^2 + 5255^2 .

It is a cyclic number.

It is not a de Polignac number, because 87398849 - 2¹⁶ = 87333313 is a prime.

Together with 87398851, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 87398794 and 87398803.

It is not a weakly prime, because it can be changed into another prime (87398809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43699424 + 43699425.

It is an arithmetic number, because the mean of its divisors is an integer number (43699425).

Almost surely, 2^87398849 is an apocalyptic number.

It is an amenable number.

87398849 is a deficient number, since it is larger than the sum of its proper divisors (1).

87398849 is an equidigital number, since it uses as much as digits as its factorization.

87398849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3483648, while the sum is 56.

The square root of 87398849 is about 9348.7351550892. The cubic root of 87398849 is about 443.7808637133.

The spelling of 87398849 in words is "eighty-seven million, three hundred ninety-eight thousand, eight hundred forty-nine".