87489049 has 2 divisors, whose sum is σ = 87489050. Its totient is φ = 87489048.

The previous prime is 87489019. The next prime is 87489071. The reversal of 87489049 is 94098478.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83905600 + 3583449 = 9160^2 + 1893^2 .

It is a cyclic number.

It is not a de Polignac number, because 87489049 - 2¹³ = 87480857 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 87488993 and 87489011.

It is not a weakly prime, because it can be changed into another prime (87489019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43744524 + 43744525.

It is an arithmetic number, because the mean of its divisors is an integer number (43744525).

Almost surely, 2^87489049 is an apocalyptic number.

It is an amenable number.

87489049 is a deficient number, since it is larger than the sum of its proper divisors (1).

87489049 is an equidigital number, since it uses as much as digits as its factorization.

87489049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 580608, while the sum is 49.

The square root of 87489049 is about 9353.5580930467. The cubic root of 87489049 is about 443.9334792667.

The spelling of 87489049 in words is "eighty-seven million, four hundred eighty-nine thousand, forty-nine".