966493909 has 4 divisors (see below), whose sum is σ = 992615404. Its totient is φ = 940372416.

The previous prime is 966493901. The next prime is 966493951. The reversal of 966493909 is 909394669.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 909394669 = 223 ⋅4078003.

It can be written as a sum of positive squares in 2 ways, for example, as 708730884 + 257763025 = 26622^2 + 16055^2 .

It is a cyclic number.

It is not a de Polignac number, because 966493909 - 2³ = 966493901 is a prime.

It is a super-2 number, since 2×966493909² = 1868220952268200562, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 966493909.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (966493901) 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 in 3 ways as a sum of consecutive naturals, for example, 13060692 + ... + 13060765.

It is an arithmetic number, because the mean of its divisors is an integer number (248153851).

Almost surely, 2^966493909 is an apocalyptic number.

It is an amenable number.

966493909 is a deficient number, since it is larger than the sum of its proper divisors (26121495).

966493909 is a wasteful number, since it uses less digits than its factorization.

966493909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26121494.

The product of its (nonzero) digits is 2834352, while the sum is 55.

The square root of 966493909 is about 31088.4851512582. The cubic root of 966493909 is about 988.7041880638.

The spelling of 966493909 in words is "nine hundred sixty-six million, four hundred ninety-three thousand, nine hundred nine".