966521749 has 2 divisors, whose sum is σ = 966521750. Its totient is φ = 966521748.

The previous prime is 966521701. The next prime is 966521753. The reversal of 966521749 is 947125669.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 865418724 + 101103025 = 29418^2 + 10055^2 .

It is a cyclic number.

It is not a de Polignac number, because 966521749 - 2²⁷ = 832304021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (966521779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 483260874 + 483260875.

It is an arithmetic number, because the mean of its divisors is an integer number (483260875).

Almost surely, 2^966521749 is an apocalyptic number.

It is an amenable number.

966521749 is a deficient number, since it is larger than the sum of its proper divisors (1).

966521749 is an equidigital number, since it uses as much as digits as its factorization.

966521749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 816480, while the sum is 49.

The square root of 966521749 is about 31088.9329022403. The cubic root of 966521749 is about 988.7136812294.

The spelling of 966521749 in words is "nine hundred sixty-six million, five hundred twenty-one thousand, seven hundred forty-nine".