87665741 has 2 divisors, whose sum is σ = 87665742. Its totient is φ = 87665740.

The previous prime is 87665729. The next prime is 87665779. The reversal of 87665741 is 14756678.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67996516 + 19669225 = 8246^2 + 4435^2 .

It is a cyclic number.

It is not a de Polignac number, because 87665741 - 2¹⁴ = 87649357 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 87665692 and 87665701.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87665701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43832870 + 43832871.

It is an arithmetic number, because the mean of its divisors is an integer number (43832871).

Almost surely, 2^87665741 is an apocalyptic number.

It is an amenable number.

87665741 is a deficient number, since it is larger than the sum of its proper divisors (1).

87665741 is an equidigital number, since it uses as much as digits as its factorization.

87665741 is an evil number, because the sum of its binary digits is even.

The product of its digits is 282240, while the sum is 44.

The square root of 87665741 is about 9362.9985047526. The cubic root of 87665741 is about 444.2321328284.

The spelling of 87665741 in words is "eighty-seven million, six hundred sixty-five thousand, seven hundred forty-one".