87766537 has 2 divisors, whose sum is σ = 87766538. Its totient is φ = 87766536.

The previous prime is 87766517. The next prime is 87766541. The reversal of 87766537 is 73566778.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46498761 + 41267776 = 6819^2 + 6424^2 .

It is a cyclic number.

It is not a de Polignac number, because 87766537 - 2⁷ = 87766409 is a prime.

It is not a weakly prime, because it can be changed into another prime (87766517) 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, 43883268 + 43883269.

It is an arithmetic number, because the mean of its divisors is an integer number (43883269).

Almost surely, 2^87766537 is an apocalyptic number.

It is an amenable number.

87766537 is a deficient number, since it is larger than the sum of its proper divisors (1).

87766537 is an equidigital number, since it uses as much as digits as its factorization.

87766537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1481760, while the sum is 49.

The square root of 87766537 is about 9368.3796357748. The cubic root of 87766537 is about 444.4023234920.

The spelling of 87766537 in words is "eighty-seven million, seven hundred sixty-six thousand, five hundred thirty-seven".