947306989 has 2 divisors, whose sum is σ = 947306990. Its totient is φ = 947306988.

The previous prime is 947306951. The next prime is 947306993. The reversal of 947306989 is 989603749.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 946792900 + 514089 = 30770^2 + 717^2 .

It is a cyclic number.

It is not a de Polignac number, because 947306989 - 2¹³ = 947298797 is a prime.

It is a super-2 number, since 2×947306989² = 1794781062816492242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (947306909) 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, 473653494 + 473653495.

It is an arithmetic number, because the mean of its divisors is an integer number (473653495).

Almost surely, 2^947306989 is an apocalyptic number.

It is an amenable number.

947306989 is a deficient number, since it is larger than the sum of its proper divisors (1).

947306989 is an equidigital number, since it uses as much as digits as its factorization.

947306989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2939328, while the sum is 55.

The square root of 947306989 is about 30778.3526037376. The cubic root of 947306989 is about 982.1177958584.

The spelling of 947306989 in words is "nine hundred forty-seven million, three hundred six thousand, nine hundred eighty-nine".