945281969 has 2 divisors, whose sum is σ = 945281970. Its totient is φ = 945281968.

The previous prime is 945281959. The next prime is 945281971. The reversal of 945281969 is 969182549.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 563587600 + 381694369 = 23740^2 + 19537^2 .

It is an emirp because it is prime and its reverse (969182549) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-945281969 is a prime.

It is a super-2 number, since 2×945281969² = 1787116001833033922, which contains 22 as substring.

Together with 945281971, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 945281969.

It is not a weakly prime, because it can be changed into another prime (945281959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 472640984 + 472640985.

It is an arithmetic number, because the mean of its divisors is an integer number (472640985).

Almost surely, 2^945281969 is an apocalyptic number.

It is an amenable number.

945281969 is a deficient number, since it is larger than the sum of its proper divisors (1).

945281969 is an equidigital number, since it uses as much as digits as its factorization.

945281969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1399680, while the sum is 53.

The square root of 945281969 is about 30745.4381819482. The cubic root of 945281969 is about 981.4174853926.

The spelling of 945281969 in words is "nine hundred forty-five million, two hundred eighty-one thousand, nine hundred sixty-nine".