87378713 has 2 divisors, whose sum is σ = 87378714. Its totient is φ = 87378712.

The previous prime is 87378689. The next prime is 87378721. The reversal of 87378713 is 31787378.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72114064 + 15264649 = 8492^2 + 3907^2 .

It is a cyclic number.

It is not a de Polignac number, because 87378713 - 2¹⁴ = 87362329 is a prime.

It is not a weakly prime, because it can be changed into another prime (87378013) 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, 43689356 + 43689357.

It is an arithmetic number, because the mean of its divisors is an integer number (43689357).

Almost surely, 2^87378713 is an apocalyptic number.

It is an amenable number.

87378713 is a deficient number, since it is larger than the sum of its proper divisors (1).

87378713 is an equidigital number, since it uses as much as digits as its factorization.

87378713 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 197568, while the sum is 44.

The square root of 87378713 is about 9347.6581559233. The cubic root of 87378713 is about 443.7467799013.

The spelling of 87378713 in words is "eighty-seven million, three hundred seventy-eight thousand, seven hundred thirteen".