965643013 has 4 divisors (see below), whose sum is σ = 965705440. Its totient is φ = 965580588.

The previous prime is 965643011. The next prime is 965643043. The reversal of 965643013 is 310346569.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 310346569 = 13 ⋅23872813.

It is a cyclic number.

It is not a de Polignac number, because 965643013 - 2¹ = 965643011 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (965643011) 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, 11206 + ... + 45352.

It is an arithmetic number, because the mean of its divisors is an integer number (241426360).

Almost surely, 2^965643013 is an apocalyptic number.

It is an amenable number.

965643013 is a deficient number, since it is larger than the sum of its proper divisors (62427).

965643013 is a wasteful number, since it uses less digits than its factorization.

965643013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62426.

The product of its (nonzero) digits is 58320, while the sum is 37.

The square root of 965643013 is about 31074.7970709384. The cubic root of 965643013 is about 988.4139529369.

The spelling of 965643013 in words is "nine hundred sixty-five million, six hundred forty-three thousand, thirteen".