87765737 has 2 divisors, whose sum is σ = 87765738. Its totient is φ = 87765736.

The previous prime is 87765719. The next prime is 87765749. The reversal of 87765737 is 73756778.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51897616 + 35868121 = 7204^2 + 5989^2 .

It is a cyclic number.

It is not a de Polignac number, because 87765737 - 2¹⁸ = 87503593 is a prime.

It is not a weakly prime, because it can be changed into another prime (87765767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43882868 + 43882869.

It is an arithmetic number, because the mean of its divisors is an integer number (43882869).

Almost surely, 2^87765737 is an apocalyptic number.

It is an amenable number.

87765737 is a deficient number, since it is larger than the sum of its proper divisors (1).

87765737 is an equidigital number, since it uses as much as digits as its factorization.

87765737 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728720, while the sum is 50.

The square root of 87765737 is about 9368.3369388595. The cubic root of 87765737 is about 444.4009732320.

The spelling of 87765737 in words is "eighty-seven million, seven hundred sixty-five thousand, seven hundred thirty-seven".