87322913 has 2 divisors, whose sum is σ = 87322914. Its totient is φ = 87322912.

The previous prime is 87322901. The next prime is 87322919. The reversal of 87322913 is 31922378.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80856064 + 6466849 = 8992^2 + 2543^2 .

It is a cyclic number.

It is not a de Polignac number, because 87322913 - 2¹⁰ = 87321889 is a prime.

It is a super-2 number, since 2×87322913² = 15250582269611138, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (87322919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43661456 + 43661457.

It is an arithmetic number, because the mean of its divisors is an integer number (43661457).

Almost surely, 2^87322913 is an apocalyptic number.

It is an amenable number.

87322913 is a deficient number, since it is larger than the sum of its proper divisors (1).

87322913 is an equidigital number, since it uses as much as digits as its factorization.

87322913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 35.

The square root of 87322913 is about 9344.6729744812. The cubic root of 87322913 is about 443.6523009672.

The spelling of 87322913 in words is "eighty-seven million, three hundred twenty-two thousand, nine hundred thirteen".