965739721 has 2 divisors, whose sum is σ = 965739722. Its totient is φ = 965739720.

The previous prime is 965739661. The next prime is 965739737. The reversal of 965739721 is 127937569.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 946423696 + 19316025 = 30764^2 + 4395^2 .

It is a cyclic number.

It is not a de Polignac number, because 965739721 - 2¹⁵ = 965706953 is a prime.

It is not a weakly prime, because it can be changed into another prime (965739781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 482869860 + 482869861.

It is an arithmetic number, because the mean of its divisors is an integer number (482869861).

Almost surely, 2^965739721 is an apocalyptic number.

It is an amenable number.

965739721 is a deficient number, since it is larger than the sum of its proper divisors (1).

965739721 is an equidigital number, since it uses as much as digits as its factorization.

965739721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 714420, while the sum is 49.

The square root of 965739721 is about 31076.3530839769. The cubic root of 965739721 is about 988.4469479963.

The spelling of 965739721 in words is "nine hundred sixty-five million, seven hundred thirty-nine thousand, seven hundred twenty-one".