87412709 has 2 divisors, whose sum is σ = 87412710. Its totient is φ = 87412708.

The previous prime is 87412603. The next prime is 87412723. The reversal of 87412709 is 90721478.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65529025 + 21883684 = 8095^2 + 4678^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87412709 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87412729) 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, 43706354 + 43706355.

It is an arithmetic number, because the mean of its divisors is an integer number (43706355).

Almost surely, 2^87412709 is an apocalyptic number.

It is an amenable number.

87412709 is a deficient number, since it is larger than the sum of its proper divisors (1).

87412709 is an equidigital number, since it uses as much as digits as its factorization.

87412709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 87412709 is about 9349.4764024516. The cubic root of 87412709 is about 443.8043212215.

The spelling of 87412709 in words is "eighty-seven million, four hundred twelve thousand, seven hundred nine".