966978449 has 4 divisors (see below), whose sum is σ = 968020260. Its totient is φ = 965936640.

The previous prime is 966978433. The next prime is 966978473. The reversal of 966978449 is 944879669.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 152275600 + 814702849 = 12340^2 + 28543^2 .

It is a cyclic number.

It is not a de Polignac number, because 966978449 - 2⁴ = 966978433 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 966978391 and 966978400.

It is not an unprimeable number, because it can be changed into a prime (966971449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 519512 + ... + 521369.

It is an arithmetic number, because the mean of its divisors is an integer number (242005065).

Almost surely, 2^966978449 is an apocalyptic number.

It is an amenable number.

966978449 is a deficient number, since it is larger than the sum of its proper divisors (1041811).

966978449 is a wasteful number, since it uses less digits than its factorization.

966978449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1041810.

The product of its digits is 23514624, while the sum is 62.

The square root of 966978449 is about 31096.2770922823. The cubic root of 966978449 is about 988.8693854117.

The spelling of 966978449 in words is "nine hundred sixty-six million, nine hundred seventy-eight thousand, four hundred forty-nine".