913216987 has 2 divisors, whose sum is σ = 913216988. Its totient is φ = 913216986.

The previous prime is 913216973. The next prime is 913216991. The reversal of 913216987 is 789612319.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 913216987 - 2¹⁹ = 912692699 is a prime.

It is not a weakly prime, because it can be changed into another prime (913216907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 456608493 + 456608494.

It is an arithmetic number, because the mean of its divisors is an integer number (456608494).

Almost surely, 2^913216987 is an apocalyptic number.

913216987 is a deficient number, since it is larger than the sum of its proper divisors (1).

913216987 is an equidigital number, since it uses as much as digits as its factorization.

913216987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 46.

The square root of 913216987 is about 30219.4802569468. The cubic root of 913216987 is about 970.1926803971.

The spelling of 913216987 in words is "nine hundred thirteen million, two hundred sixteen thousand, nine hundred eighty-seven".