965986649 has 2 divisors, whose sum is σ = 965986650. Its totient is φ = 965986648.

The previous prime is 965986613. The next prime is 965986661. The reversal of 965986649 is 946689569.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 504811024 + 461175625 = 22468^2 + 21475^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-965986649 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 965986591 and 965986600.

It is not a weakly prime, because it can be changed into another prime (965986849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 482993324 + 482993325.

It is an arithmetic number, because the mean of its divisors is an integer number (482993325).

Almost surely, 2^965986649 is an apocalyptic number.

It is an amenable number.

965986649 is a deficient number, since it is larger than the sum of its proper divisors (1).

965986649 is an equidigital number, since it uses as much as digits as its factorization.

965986649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25194240, while the sum is 62.

The square root of 965986649 is about 31080.3257544061. The cubic root of 965986649 is about 988.5311854719.

The spelling of 965986649 in words is "nine hundred sixty-five million, nine hundred eighty-six thousand, six hundred forty-nine".