945318389 has 2 divisors, whose sum is σ = 945318390. Its totient is φ = 945318388.

The previous prime is 945318359. The next prime is 945318397. The reversal of 945318389 is 983813549.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 578787364 + 366531025 = 24058^2 + 19145^2 .

It is an emirp because it is prime and its reverse (983813549) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-945318389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (945318349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 472659194 + 472659195.

It is an arithmetic number, because the mean of its divisors is an integer number (472659195).

Almost surely, 2^945318389 is an apocalyptic number.

It is an amenable number.

945318389 is a deficient number, since it is larger than the sum of its proper divisors (1).

945318389 is an equidigital number, since it uses as much as digits as its factorization.

945318389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 933120, while the sum is 50.

The square root of 945318389 is about 30746.0304592316. The cubic root of 945318389 is about 981.4300893094.

The spelling of 945318389 in words is "nine hundred forty-five million, three hundred eighteen thousand, three hundred eighty-nine".