87973549 has 2 divisors, whose sum is σ = 87973550. Its totient is φ = 87973548.

The previous prime is 87973507. The next prime is 87973579. The reversal of 87973549 is 94537978.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66536649 + 21436900 = 8157^2 + 4630^2 .

It is a cyclic number.

It is not a de Polignac number, because 87973549 - 2¹³ = 87965357 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 87973496 and 87973505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87973579) 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, 43986774 + 43986775.

It is an arithmetic number, because the mean of its divisors is an integer number (43986775).

Almost surely, 2^87973549 is an apocalyptic number.

It is an amenable number.

87973549 is a deficient number, since it is larger than the sum of its proper divisors (1).

87973549 is an equidigital number, since it uses as much as digits as its factorization.

87973549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1905120, while the sum is 52.

The square root of 87973549 is about 9379.4215706514. The cubic root of 87973549 is about 444.7514481196.

The spelling of 87973549 in words is "eighty-seven million, nine hundred seventy-three thousand, five hundred forty-nine".